I've changed my mind over the past year or two. I used to have a dilettante-ish support for the EU cos of the social chapter, working time directive & other workers' rights etc, and the principle of generally cooperating with our neighbours. But the past few years have seen the EU pushing the bosses' neoliberal agenda even harder, and the attacks on the economies of the southern Euro countries are entrenching poverty and inequality. As I've learnt more about how the EU works, I like it less and less.
I do think it's a bit like the AV vote - a false 'choice' sold as something meaningful. I would probably spoil my ballot at the moment, but as I learn more I'm moving more towards saying GTFO.
Then there is stuff like
this where the EU are doing a 'free trade' deal with the US which would mean - among other things - that NHS services would have to be open to bids from private money/private contracts
in perpetuity, with no chance of renationalisation ever. Fuck that.