I was one of the 48% of those who voted to Remain and, though I sometimes I was one of the 48% of those who voted to Remain and, though I sometimes have despaired of some of the things said by those in my camp, I am still a Remainer. In political and economic terms, I am a relative "know nothing" yet it has become increasingly clear that I know a lot more than most however, like everyone else who voted, I was asked to become a politician, a diplomat and an economic specialist for one day. Of course, I couldn't become that but I did do some research and, very briefly, voted remain for a number of reasons.
Finance is important to everyone and, whilst I felt Brexit would make little difference to me personally, I'd still get paid and I only had some 7 years to go until retirement. I was wrong as I was made redundant and it was mooted that the primary reason was uncertainties with respect to Brexit. Claims were made that Britain would be "leaner and meaner" which, with almost 40 years of work behind me, I knew referred to ordinary workers like me, not management or the elite. It was clear to me that the media (the right-wing tabloids in particular) have inflamed many Brits to a simmering xenophobic, nationalism when it is clear that any advancing technological nation needs the kind of skilled, trained workers from abroad. From the kind of fervour being whipped up I also felt it was not a great step from where we were to the kind of situation exiting pre-WW" Germany where such people were declared sub-human (or "Untermensch"). Humans do things better in cooperation with science, for example, advancing far faster than history suggests by the combined effort of "ordinary" jobbing scientists from all over the world.
But my major reason was quite simply war as there hasn't been a single conflict in the Eurozone since the end of WW2, and that in a region rife with war something clearly to do with standard of living and that the EU represents a forum to talk out our problems instead of fighting.