I'm a pure sub, I don't do anything dom unfortunately.
I can play pretty much anything: Fem, futa, femboy, cuntboy, male, or anything else really! Though, personally, I lean towards playing (or ending up as, since feminisation is hot) fem, cuntboy or femboy.
The only hard limits of mine I've personally encountered are extreme gore (organs and such), eye stuff (i mean touching eyes, not the concept of sight) and prolapses. Other than that, go nuts!
I tend to favour short responses, but I can do paragraph or multi-paragraph responses if the RP suits it and really gets me invested like that. I probably wouldn't count on it, though.
I prefer private roleplays over public ones.