Mmm, I like this one. Mini-stylishness.
The animation is as smooth as your mom. Mmm...
...
Sorry about that. >_>.
Anyways. The running looks like tiny hops sometimes. Perhaps you can modify the upper body so it goes forward, and then lags a bit, so to create the illusion that while running, the guy is speeding up when pushing with his leg, and slows a bit as he lands.
Other than that, muy muy sexy.