I like porn with hot curvy pornstars... big booty is a must, boobs are nice for visuals and face must be attractive and chick must have some class... Also I prefer B/G... I cannot just relate to G/G... porn makes lesbian sex boring... I rather see a cock hungry thirsty pornstar who loves sex than another boring woman doing circus tricks for couple bucks... Sometimes I watch normal porn, sometimes I prefer fetish sections... Femdom is kind of funny sometimes within certain range, but I'd say it's more about certain atmosphere and leading personality connected to things I like anyway (you know, everybody wants to play resistant while someone else does all the work), while I barely have any interest in those non-sexual physical violence type of areas.
I don't fantasize about girls having sex with girls I fantasize of having multiple girls all for myself... That I kind of like those harem like things like king and his servant ladies worshiping me, or bunch of girls using me sexually... Either way the theme is the same, I sit back and enjoy the show while girls do all the work and I get what I like... Only difference is in first one includes more love-making atmosphere, with girls doing whatever they think works the best to get the attention of the kind, including more touching everywhere and seduction. Another has a bunch of girls riding on me because they like to be on top and with multiple girl there should more more than enough ass to make sure I'll have something to eat, while other chick ride my cock...
Short version; Pretty much any normal porn that looks hot, with a woman on top... She must be able to give me some bedroom challenge, spread her lady parts to the camera for the visual pleasures and play her cards dirty (bedroom is a wild west, use or be used, in a bedroom you have to be little bit selfish). I also like when girl can do dirty talking, but that's pretty tricky area (balance between what somebody wants to hear and what makes things sound less cliche and forced line) and sometimes it's just better to keep your mouth shut...