I love role playing I have had the pleasure of doing it with some very sexy women who got into it as well.
The SP's who have been in this industry for a while know how male sexuality works and most of them are ok with it even though some of the roles could be considered taboos, but then, isn't that what fantasies and role plays are; un-dicussable, dark desires deep down inside us that we won't talk openly about.
As far as me recommending anyone in particular is concerned, I would not name names because of the YMMV factor. All I can say is that it gets better with repeat visits.

Remember that role play is sort of acting in a movie and some people are better actors than the others.
Good Luck.
T8E