I couldn't make a decision until the full details were laid out. I don't support full withdrawal from the EU, more of a renegotiation of position towards a Norway style agreement with more reasonable net contributions and only the trade related laws.
If that wasn't an option, I'd choose to stay in.
The other, oft overlooked issue (the same is often overlooked by Scottish and Welsh nationalists) is what deal we would be able to achieve... That might also be enough to swing the vote one way or another for me. Leaving is not simply a unilateral decision, there will be consequences, and just as we would argue for the best deal, so would everyone else.