I think I recall hitmonlee leaning back a bit the whole time he did his flurry of kicks, no?
I actually have the show... I should watch it and find out. >_<
Well, the axe kick seems very stiff in how the leg moves, especially for having 'elastic' legs. 
Well, yes he does lean back for that animation, I thought you meant the body should move even more than that. I pretty much have him leaning back for all of those kicks except for the new axe kick, so what did you mean the body should move more? I can't really think of a way to make Hitmonlee lean farther back without stretching his torso in a wierd way.
And if you have any ideas for how to improve the axe kick and make the legs look elastic, I would love to hear them, it's why I posted it before I started to color it.
Rox, I watched the video you showed and it's great as a reference tool. But... his arms really don't move that much in the video, just like all the other TKD videos that I watched while making this animation. They are bent up into his chest through pretty much the whole kick, just as my sprites arms stay bent, only changing their postion relative to the body itself.
I really appreciate all the crit, and I feel close minded in that I'm having a hard time incorporating it. I think maybe an edit (even just a 1-frame outline edit) would be really helpful for me to see what u guys are trying to get across to me.