Not me. I'm a genuine, "don't know".
I voted, "in" when we had the original vote. So, sorry, partly my fault.
Reason's for leaving would be the colossal amounts of money they waste (the complete opposite of Onionmans's argument). They used to rotate the HQ between Brussels and Strasbourg to keep the French happy, cost €200m plus a year. Do they still do this? I know they voted against it but the French vetoed it. Plus 1000s of staff in Luxembourg of course!
Years ago, I visited our MEP, James Hill, in Brussels. At one point during our discussion he had to break off to vote. Now, he had taken no part, active or passive, in the debate because he had been talking to me. So, in effect, the debate was completely irrelevant and the cost of him being there was just money for nothing (and that is insignificant in relation to other major, equally unnecessary costs).
Then there is the ridiculous concept of further political integration. Lets face it Scotland even wants independence from Britain so how anyone expects the whole of Europe to be one 'United State' I don't know.
Reasons for staying, basically the great unknown. No one actually knows what will happen, how the rest of Europe will treat us etc. It would be a gamble.
http://news.sky.com/story/1645947/your-eu-referendum-survival-guide
Think you may need this
The voting thing is the same in the UK Parliament. A bell rings if they have to vote because they can't agree something in the chamber. All the MP's vote, usually on party lines, so I assume this may have been something similar.
Part of the deal DC got is removing the ever closer union part so if we stayed there won't be anymore of that. Even if the MP's want to it is already in law that they have to have another referendum if they want to give away more powers. So we could all say no. Scotland is a strange case. The SNP don't want to be part of the UK but do want to be in Europe. Either way it's not really independence.