Well, most of my gamer friends are basically achievement whores, but it seems I'm pretty much the only person in the world who can't stand them.
Take Left 4 Dead, which is what we've been playing a lot lately, all they can talk about is this and that achievement and how awesome they are.
But really the only achievement I think is worth mentioning is the "play an entire campaign with only your pistols". Mainly because most people seem to think that the pistols are only a last resort, but in capable hands they can really be just as deadly as any other weapon.
Overall, when a developer adds achievements to a game, I can't help but feel that they weren't able to come up with anything else.
Basically they're trying to get people to play their game more, but not for the sake of playing.......or fun.