I've played a fair bit of RP's in my short live. I started at age 14, and I'm now 27.
I generally enjoy playing monster races over the regular players handbook races, but have no issues playing one if the campaign demands it. I've got no preference for alignment, though I would not shy away from an evil campaign or a campaign with adult themes, although I still hold that one should be able to opt for a fade-to-black whenever if it becomes too much.
I prefer campaigns that mix both roleplay and rollplay, but I lean more towards roleplay than rollplay, since I have a fair bit of experience as a LARPer as well.