Idle animations are among my favorite little hidden gems in any game. While most games with visible characters have them, not everyone takes the time to put some of the character into the animaiton. The stuff done by Earthworm Jim in his second game still give me a chuckle. It still creeps me out a bit that he had a little Hula'ing person in his pocket...that he ate.

In Rez, while in the 4th (Yoga-ish) form, when you go from level to level, the little dude inside his flying bubble starts to vogue until the action starts up again. I always loved that.

There are far too many lovable animations in Monster Hunter: Freedom. Possibly the best one is most easily classified as the "Oh Shit!" run. The characters get a crawling, creeping, walking, jogging, and running animation, but if there's a big effin dragon on screen the characters run animation is affected. Instead of being a concentrated sprint, it turns into this Holy Fuck I'm Going To Get Eaten wild run. So good.

And it's funny you bring this topic up to, because I actually captured video from Psychonauts (which I still haven't finished. I know, I'm sorry) because it tickled me so much. And that'd be this:

About the only one I can think of off the top of my head that wasn't actually an idle animation is from Bust A Groove 2. This one is harder to describe. There's a zombie character named Bi-O. One of his dance moves in the game involved him spinning around a couple of times, but after he stops spinning, and his body goes into the next animation, his head spins around an extra time without the body....because he's a zombie and he can do that.