...did you guys animate using the line+line editing tool? The lines look a bit too...stiff and non-lifelike...a bit too..mechanical. If you sketched it first, then went over the sketch with the line tool, I'm not sure what the problem is. I've seen the line tool used to go over pro-animations to give them their smooth look, but I haven't experimented enough with it to distinguish between the approach that gives line-stiffness and the approach that gives fuild crispness.