Personally, I think that the preference of whether or not you ask for some roleplaying in addition to a social check like a Diplomacy check is directly related to The Mirrorball Man's gripe:
That being said, I really hate players who think you're an entertainer and they're your audience. They expect to be entertained and don't think they're supposed to contribute anything to the game.
I gotta admit, it's something that can annoy me, too, although I'd probably classify it more as "I love it when players do this" than "I hate it when players don't do this." Running a game is hard work, particularly if you have to improvise a lot. I appreciate players who do their part not only to make my job easier in the sense of knowing the rules, but who contribute to other players' immersion and enjoyment of the game. You know, the sort of player who says something in-character that everyone talks about for weeks. ("Yeah, and then Thurgrim says to the wizard, 'Let's see if you can finish that incantation with my sword in your lung!'") The one who keeps combat lively by putting a little more description into their actions than "I hit the orc. 15." The one who, damn his hide, forces me to improvise more on the spot and makes the session and the game world better for it. ("Hey, are there any tattoo artists in town? I mean, good ones." "Um... yeah. There's... ah... Yeah, once you start looking into it, you find..." (frantically jotting down notes) "...that there's an autumn elf who runs an expensive tattoo parlor in the northern district. They say she has an artistic temperament." "Cool. That's where I go.")
I don't advocate trying to force that sort of thing from players, of course, because not everyone's up to doing things that can entertain the other guys and gals around the table. Still, I do prefer to game with folks who deliberately try to help entertain the entire group. When you have a table full of them... ah, bliss.
What irks me as a GM is when my dogs fail to realize that it's time for them to lie down and relax for the evening, and I have to coerce them away from the table so that we can get back to the game. I lose more face that way.
And players who insist on keeping character secrets from other players. Surprising the other players is all well and good, but it makes my life so much harder trying to remember what I'm "allowed" to mention around other players or not. Like I don't have enough to do with keeping track of all my stupid secrets.
Oh yeah, and puns. I can't believe nobody's mentioned puns yet.