With a woman, I love:
me dominating (no, really!),
face-sitting, usually with me on the receiving end,
school girl fantasies, with her as a the school girl.
With a man, I love:
me being submissive,
having my hair played with/pulled/brushed (it's waist-length),
school girl fantasies, with me as the school girl.
With both genders, I love:
some light dirty talk,
These don't really count as fetishes, but I love it when I can use sensitizing gels and creams on a woman, and I really like it when men bend me over surfaces that are so high I'm practically on tip-toes.