Woot awesome man.
Your blinks seem too slow. If you're feeling ambitious try altering the blinks to something like:
open -----> 2/3 open -----> closed -----> closed -----> 2/3 closed -----> open
Each one of those being 1 frame. So the entire blink is done in 6 frames or so.
I'd probably have him blink on his first head turn to screen right, and maybe have his eyes dart there instead of being over there the entire time. Same thing a little bit after, you've got a couple of big head turns with no blinks. Just nit picky stuff. Nothing kills a good monologue like a distracting face.
The mouth shapes look good man, I'm no master of mouths but nothing stands out as off to me. Just the eyes.