I haven't read the replies yet, because I want to get these out before I forget.
In no particular order:
1. Talking cameramen. Especially in POV vids (which, otherwise, I love). No one watches these things so we can hear the cameraman's self-indulgent tripe or to hear some dude moan so loudly and often that it becomes center of attention, ruining the whole thing.
2. When guys hold the chick's head when she's sucking him. I know, sometimes it's just to guide her rhythm, but more often than not, it just throws everything off. I hate it when I'm watching this beautiful woman and suddenly some dude's hand is holding her head like a bowling ball.
3. Women in porn who can't take a cumshot. Be they cum-dodgers (who have no business doing porn), or the instant-spitters (why take the shot in the mouth if you aren't gonna swallow it?). No matter how great the rest of the scene was, that little move tends to ruin it for me.
4. Violence. Slapping, hair pulling, clawing. Not my thing at all. Total turnoff. This aggression will not stand, man. It's a violent world. I don't need it in sex.
5. Tattoos - Not ALL tatts, but most of them. Not just what the tattoo is of, but the locations and number of them on a woman. They look ridiculous to me. There are only some exceptions, like Mason Moore.
But what I'm noticing more and more are the STAR tattoos! I swear, half of the porn population has to get star tattoos. Often, more than one and in very awkward places.
Then there are the chest tattoos. All of them are awful. I have found no exception there. Way too many beautiful women ruined by tattoos.
It seems that most tattoo artists are as evil and greedy as plastic surgeons, lawyers and heroin dealers. They're getting the money so they don't care.
6. Really short hair on women. I mean, I can't stand it when it seems like I'm looking at a boy. Or when the guy's hair is longer than hers. Seems so trivial but it just doesn't do it for me.
7. (This should've followed #1) Most MMF/MMMF/Gangbangs. I don't like the men outnumbering the women onscreen. I don't like watching DP, least of all in the same hole. Instant turnoff if 2 dicks get too close.
I've seen 3 dicks go into a chick before, and I was horrified. Thinking "Jeezuss, all the dude in the middle can probably feel is cock!"
Sorry for the long rant...