Just one and that's my own community at the moment. Between working on my forum and working on my blog, I feel like that is enough work for me at the moment.
Just my own forum. Can't really be bothered being staff on more than one or two forums at any given time, then I just get confused as everything tends to blend together. 😛
I'm staff on my own forums, and I don't believe I'm staff on any other ones at the moment. Technically still in the admin usergroup on a few forums that I sold, but I wouldn't count that.
None these days as I don't really miss being staff anywhere either. I like just being a member when I can come and go as I please and not be expected to have to be anywhere or do anything.