I voted Remain because I believe that being in the EU is good for the UK, and that being a member of the largest trading bloc on earth, made up of our closest neighbours, is financially and culturally beneficial for us. I think that things like FOM are, on balance, positives not negatives, given that EU migrants are net contributors to our economy. I work in both the NHS and in academia and I see, on a daily basis, how important membership of the EU is to both of those, in terms of staffing, funding and exchange of ideas/research/good practice, and how that benefits patients.
I do not believe that the EU is a perfect institution. I'm quite sure there is waste, inefficiency, etc. but the difference is that I would want to stay and change/influence those things from the inside. I understand that the issues with our country are due to domestic policy decisions, not to the interference of the EU. The EU has been used as a scapegoat to distract from the incompetence and arrogance of our own - elected - leaders. This has been happening for decades and we have become so used to it that we fail to use critical thinking any longer - it's so much easier just to point at the EU than consider our failings closer to home.
I do not think there is any chance that a medium-sized economy such as ours will have anything like the influence and power on the world stage if we 'go it alone' than as part of the EU. That's not talking the country down, it's just being pragmatic.
I think leaving will have a negative impact on our economy for years to come, and as someone who works with vulnerable people I can see that may will not be able to cope with a downturn/contraction in the economy. Many are on a knife-edge already.
I am fearful, frankly, of the UK becoming more inward-looking, more parochial, if we leave the EU. I love this country, I want it to thrive - I think the best chance of that is by remaining in a political, economic and cultural bloc of 500 million people, not by isolating ourselves. Brexit simply makes no sense to me at all.