While my current favorite sexual fetish/theme is and has been Japanese porn for some time now, I do like to take a break and enjoy other porn now & then as well. Some of my other favorites and why I like them (some fall under Japanese as well, but elsewhere too):
One that most people probably wouldn't know I like to seome extent is shemales/futanari/dickgirls/whatever you might call them. I'm kinda picky here though-I obviously am not into shemales fucking guys, but I do like shemales doing shemales or other girls and especailly solo scenes-I love watching a beautiful dickgirl stroking her cock to orgasm-but not the slow, gentle strokers. I like when they do it hard and fast.
Another of my recent favorites is handjobs-obviously this isn't for everyone but for me there's just something about a girl stroking a guy's hard cock and making him come at the end. On this note I also of course love watching girls masturbating, especially when they keep doing it even after they're coming and watching it ooze out of their wet cunts. Side note: I prefer fingering/hands only over toys/vibrators.
Another no-brainer that i can't get enough of is big breasts. There's just something about breasts that make them hard to resist and impossible to not stare at-and since it seems everyone has a preference when it comes to real or fake breasts, I actually have no real preference as I have reasons for liking both. Girls with real breasts I've noticed tend to have bigger and harder nipples (a real turn-on for me) while girls with fake breasts obviously tend to be more rounder and not as saggy as real. But to me teh bottom line is breasts are breasts and I love them so much.
What I'd call my guilty pleasure is hentai anime. I got into it long before Japanese porn mainly because it's perhaps the best form of fantasy-yeah, the girls aren't real but in just about every other way they're perfect-most are irresistably cute, have perfect breasts and are insatiably horny. And of course there's the fantasies related to popular anime/cartoon/video game characters, which I really enjoy.
Another one is catfights/sexfights. This probably stems from my being a wrestling/MMA fan, I definitely like scenes that more closely resemble wrestling/fighting and not tons of hair-pulling and the like. Yes, I've checked out stuff from one popular pay site dedicated to this...didn't really do it for me. There are some sites I like for this that mostly either do animated/3D or apartment wrestling photos (especially good scenes of face/tit/belly punching, kicking, kneeing, hard breast grabbing/squeezing and the like).
Finally, the one I really want to get some of here-cybersex and/or dirty chat/messages. This goes back to my last couple relationships which were strictly online, and also touches on some of the above-there's just nothing like some sexy or dirty talk to get and keep me hard when I'm jerking off to porn and imagining that a girl's watching me when I'm stroking my cock and perhaps even masturbating herself. I'd try and chat with some people but I'm rather shy so if some women would chat with me when I'm on MSN or at least send me some dirty messages, photos and the like, it would be so nice to get some of that. Maybe one of these days when I have money I'll get a webcam so you can actually watch too!