Ackvavit, I'm a happy leave voter.
I think there are several key benefits to leaving.
We will form some kind of trade deal with the EU, the terms are to be worked out and in that situation we will have to follow EU laws over goods and services that are provided to them. However, we can choose the product standards we maintain here separately and it means businesses in the UK selling domestically won't have to follow rules which our government deems to be unnecessary. This is a good thing!
The EU writes laws which go beyond goods and services, for example the reason we had VAT on tampons for years is because of the EU. They are involved in divorce law and a number of areas that aren't necessary. We will no longer have to follow these laws and the only people that write laws that are followed in the UK will be directly accountable and elected by the people of the UK. This is a good thing!
In terms of trade, when you're a member of the EU, trade deals tend to be formed for the entire EU. This is a long process because all member states have to agree and any one state can take issue with something as small as canned tomatoes which can halt a trade deal. These trade deals aren't necessarily in our best interests. We can now form deals tailored to our economy with whichever countries we want to and quicker. This means we are now a more outward looking nation than as a member of the EU because we now need to work with nations across the globe. This is a good thing!
We will still have a relationship with the EU. We will still have global influence as members of NATO, the UN Security council, the G8, G20, P5, OECD and the Commonwealth but we will also have our own vote in the World Trade Organisation. We will also have stronger links with a wider range of countries through the trade deals and other diplomatic links we will need to form which gives an even wider profile as a global power. This is a good thing!
A lot of people have questioned whether leaving the EU will produce a bonfire of workers rights but they're wrong. For a start we are one of the most forward looking nations in introducing workers rights and had many of them in place before we joined. These have been enhanced by the EU, but the UK government has also enhanced the minimum requirements set out by the EU when they were implemented here. Beyond the fact that we're a pretty liberal country that cares for our citizens (NHS case in point) it would be political suicide for any party to get rid of those rights and we'd be able to vote them out in the next election. This is a good thing!
I would have voted for remain if the EU was capable of reform but it is not because of the requirement that each member state would have to have a referendum on any treaty change (required for serious reform) and they're too afraid of the result (like yesterday) if they did. (This is why they waste millions moving the EU parliament between Strasbourg and Brussels regularly.) I also believe that the EU isn't all that great as a force for good in the world, the rise of euroscepticism shows that ordinary folk don't feel like it's working for them (some of this could be blamed on national governments but not all) It hasn't dealt well with crises in Russia and Ukraine and with immigration - and I don't mean that people are coming from Syria, Libya etc. I mean that the EU doesn't support Greece and Italy well in dealing with the numbers and that they made a deal with a nation with a highly questionable regime, Turkey, to remove the problem of immigration for the EU but without considering how Turkey would deal with it as long as it's not our problem any more. This is a bad thing!
Sorry its a long one but its a complicated issue and I could go on further. But outlined above is why I chose leave and not one of those points is a problem with immigrants coming to the UK.