I always play dom, first off. I play men or futa.
In regards to Yaoi. Those will exclusively be loli, and will include things like forced crossdressing, public humiliation, and a very much destroyed little asshole and throat. ^^
For the females, I don't mind if you don't play a loli but the general theme is the same... rape or blackmail, and lots of humiliation.
Loving public scenes like busses or trains.
I like Trick or Treat themes. Maybe you walk up to the wrong house... maybe multiple boys and girls do? Maybe a shota and his milf mom?