I always avoid posting on these threads but there is some interesting dialogue here amongst the name calling etc.
What is being sought by many leavers is a deregulation of certain restrictions (like safety standards in food, environmental process, etc) and an improvement in quality of life. Those two are incompatible.
If you want to maintain a high standard of living as people have in the UK - and yes, even people living in relative poverty in the UK have a higher standard of living than people living in relative poverty in other countries (note, not talking about absolute poverty here as that is a whole different kettle of fish) - then you need to maintain strict regulations on imports/exports. This means being restricted to markets that uphold the same standards as Britain would want. Which is basically only Europe. The problem you have is that European countries are limited in individual trade agreements with non-European countries. That isn't to control what people do, that is to maintain economies of scale and protect European markets. Although I do think Europe has dropped the ball on that but don't think it's worth the UK leaving over. So, you'll still have to cut a deal with the European Union except now you're not in the vantage point of being within the Union for leverage.
In terms of the movement of people, I accept (although dislike) the argument that it doesn't affect you. Except it will when there are no people to do the work that British people don't want to do. And whatever you say, that is absolutely the truth. Baggage handlers, cleaners, wait staff in crumby restaurants are not stealing your jobs. British people aren't applying for those jobs because like Peanut1983 they're too intelligent and educated to do so. So, those jobs are being taken by people with a different skills set. It's tough - why would you get yourself into 30K+ of debt at university and then take a job that you know won't allow you to pay it off before retirement? So, how will we make that work? By increasing the minimum wage for those jobs? That isn't sustainable in the capitalist/modernist economy that Britain has built. You would have to change more than just minimum wage.
The money Britain would save from being a net contributor to the EU wouldn't go into the NHS, education etc. It would have to go into covering trade deficits, paying for environmentally sustainable energy, paying for maintaining listed buildings, subsidising agriculture etc etc whilst trade deals are being renegotiated. The EU has funds available that individuals access - beyond the government figures given above. But all of that is a moot point when Britain starts having to cover gaps in a loss of income from trade etc.
The arts, sciences, etc will suffer. Not just through a loss of funding - because I'm not sure where leavers think the money will come from to fill this gap - but through a loss of ease of collaboration. Science especially is a concern for me. Very little research that comes out of the UK is purely British. Most is now a collaborative intraEuropean affair. In the short term this will be stunted. UK universities have already been through a phase of closing and limiting their science departments. Some have reopened recently but in the most part, funding is still sadly needed for a lot of these. Much of the funding comes from European and British companies who fund specific aspects of research. This will be made much harder with Brexit and European companies might as well start funding their own centres in their own institutions of learning if they can't reach agreements with British universities. These agreements will need to include things like renegotiating intellectual property rights, funding arrangements, staffing arrangements, etc. That doesn't even take into account the need to renegotiate trade agreements for medical supplies and drugs from EU countries. We cannot trade with the US for many of these as the FDA process for approval is very different to the UK process - which is for obvious reasons (over hundreds of years of shared history) more closely aligns with EU processes.
British laws are exactly that - British. The EU makes recommendations and says you have to do stuff but governments are still sovereign states and still decide which EU referendums, recommendations and suggestions are ratified and passed as law in country. Human rights will not change - those are not EU laws. Maternity, paternity, pensions, tax, benefits etc are British laws based on minimally acceptable standards outlined by the EU. Those could all change. I don't know that any government would be that stupid. But they've been stupid enough to get us into this mess so who knows?
Immigration. The dirty word. I'm going to come back to this because this seems to be the big sticking point for most leavers. Leaving the Dublin III Agreement/Convention wouldn't actually be the golden ticket to an immigrant free Britain. There are still regulations within that that allow sovereign states to decide who to admit and who not to admit. The UK's problem would remain - once you know you want to deport an asylum seeker, where do you send them if France says no? Which, under the Dublin Agreement that France will still be part of is still an acceptable answer. Leaving the EU in this way will close the door to the UK being able to make any changes to the agreement and will in fact make the UK stand on the periphery. Denmark for example is a country who has managed to negotiate an exemption to suit them. Other countries have temporarily suspended their implementation of of the Dublin agreement when needed in times of crisis. In reality quite a lot of the rights that refugees should have access to actually stem from the UNHCR Convention on the Rights of Refugees which was first ratified in 1951. Most EU rules including Dublin III are an attempt to uphold these universal rights. It's a bit like human rights. Britain could opt out but then it would plummet in all sorts of development and democratic indicators that are also used to develop credit ratings and indices to do with stability, safety, acceptability of working conditions, measurable levels of democracy, etc.
In terms of non-refugee immigration I would be surprised if that changed a lot with EU departure. I don't see Britain suddenly demanding that loads of EU citizens be assessed and granted visas in the way that it works in Australia. Turfing EU citizens out is not a realistic option. If the UK is a net contributor to the EU in terms of money they are definitely not so in terms of working population. Leavers think that's a good thing. If we kick out EU citizens or make it harder to come here then that opens up work for British citizens. On the face of it that may be true. The reality is that many EU countries have already said they will allow British citizens to remain (some countries have stipulated a time limit and others indefinitely) - on the assumption that the favour will be returned and that the UK will continue to partner with them in things like the sciences, arts, etc. The reality is though that that would be going against what leavers in the UK want. So now there is a problem. Statistics show that of the 1.5-2.5 million UK citizens living in Europe (wide range to take into account short term residents of below one year and those in Europe on a more permanent basis) around 66-75% are of working age. So they would be sent back to the UK potentially if work permits are not granted - so you'd be competing with them for UK based employment too. Not sure what the rest would do but one has to assume that if elderly people are being returned to the EU from the UK the opposite is a realistic outcome for British retirees abroad. Again, nobody can give any answers as to what would happen here. What we do know is that there are in total more employed and employable EU citizens in the UK than there are British in the EU. So a reverse brain drain may occur for many EU countries who would stand to benefit from that in the long term. Potentially rendering the EU even more competitive in the fields of industry/sciences/arts/trade negotiation/etc.
Just in the interests of transparency, I am a citizen of the UK and another EU country. My husband is British. Our life has been geared towards moving to my country of birth - the other EU country. My British mother lives there with my non-British father. For me and my family this has been an incredibly difficult time. For me especially it has been very emotional - I have always felt European and proud of it and I am struggling with the sense that half of me now wants to divorce the other half. This is true for so many of my friends who are in the same situation. Including friends who have paid into the British economy for 20 something years and are now being made to feel ostracised and unwanted. The amount of paperwork and the associated cost they are completing or contemplating is amazing - even though nobody can give them a definitive answer on what will follow. Also, just in case my intelligence is being doubted by leavers I too have a science degree 
. And an econ degree . And a teaching qualification . And a degree in a politically related field (too outing to detail) . All from UK universities double .