I think the Mail is banned on here, but there's an article on the site ("It's an unholy mess - but here's why I'm voting to stay in the EU") which, surprising considering where it's published, sums up my views on the referendum almost exactly. For all the ludicrous, apocalyptic fearmongering on both sides, there are both very compelling reasons for staying in and very compelling reasons for leaving.
Like the writer, on balance I fall on the 'Remain' side, while acknowledging the European project's serious democratic shortcomings and focus on potentially damaging idealism over difficult reality. I'm not mad about free movement in a union of culturally and financially very different nations - I'd prefer eased movement, where standards for residency are significantly lowered for civilians of member states but with each nation making the final call - or, objectively, that the EU can set laws overriding those set by democratically elected governments, even if, subjectively, the sorts of anti-worker laws that could be passed by the likes of the Tories without EU oversight could be horrendous. Nevertheless, the free market is a great achievement and invaluable for businesses and workers, the ECJ has done some good things, and the principles of the EU in diplomatic terms are certainly commendable, even if their applicability is often questionable. Our best option, IMO, remains to stay in and try to be a positive influence in sorting out the shambles, rather than going it completely alone in a scenario we'd definitely survive, but probably not be better off in the long run.