You see I don't mind pixel art, and even enjoy it quite a lot. But even I get tired of pixeling. Making a full spritesheet in a day is simply impossible for me. I try to make one animation per day and that seems to be my limit. Today's animation was Jieo's forward movement.
(http://img35.imageshack.us/img35/3216/mylifelol.png)
As you can see in the picture, my technique is very advanced and yet super simple. I sprite till I'm bored (usually one pose is enough) and then I play a round (or 3) of super smash flash 2...
It keeps me entertained enough to keep going.