Alright! Nice little character, looks like he could be fun to animate with.
But since you asked for some crits I'm gonna bang out a few thoughts and ideas in the hope it'll help. My first thought is that the guy actually moves too much. What I mean is that it all looks too 'busy'. It's like the motion is there for motions sake, rather than there to express some 'inner thought' of the charater.
One of the advantages of using pose to pose is that it really allows you to think and isolate the 'beats' within dialogue, and to concentrate and focus on the pose and timing of poses throughout your animation. If you do it right then PtoP gives you freedom to quickly try out different posing ideas (assuming you haven't already done thumbnail sketches... or even if you have already planned it all out). It also allows you to grab each pose and, simply shifting the keys on the timeline you can totally alter the time you hit that pose.
So with that in mind, take another look at your anim and ask yourself if the emotion / inner thoughts of the character can be read clearly through your poses. It's tough, because your poses kinda run in to each other, and the gestures seem to work independent of each other. I hope that doesn't sound too harsh - but it's an interesting thing to think about. In fact that's something I learned fairly recently, that is to define a gesture as something inside a pose. The main pose would be the general body posture, and the gesture would be an action or motion within, or a part of, that posture.
So... when you get to "[hate you] and all your kind" you completely change the guy's posture for just that one single word, then go back down into the hunched over pose again. It's so quick it should be a gesture, yet it's a complete pose change that happens so fast we don't really read it. Maybe if you keep on with that posture and drop it down into the pose you have for the "orange in hue" part I think it'd work better.
But be careful not to just whack in a gesture for the sake of it. There's a lot of info you get from the beats of the dialogue, and the common mistake is to apply a grand gesture for every verbal que... but the key is to get behind that and display the inner thought.
This link may help
http://splinedoctors.com/stuff/MarkOinterview.pdf
- hope that's useful, lookig forward t updates