I actually find it quite restrictive here with what I can say on certain topics, so I try to stay out of them...
I'm quite sure it's a cultural thing though - this forum is very US centric and I really do have to work on making sure I self censor sufficiently (I don't always succeed

)
Anything remotely political (I'm still struggling with what actually constitutes politics in the eyes of the site admin, and have asked for guidance which hasn't appeared so there are still plenty of slips) or religious for instance - it's the same in other forums I've used before that the US based ones tend to get way carried away and easily offended compared to UK ones where we can natter for ages with conflicting viewpoints and opinions and still be friends and chat on other subjects with no spillover because it's far from overridingly important to us.
Still, that sort of stuff is usually a small enough part of the forum that I can usually ignore it and not miss it if it's pointed out...