this is a running test and my first animation
http://img30.imageshack.us/i/runningtest.gif/
Ummm, I don't know what to say... that was really bad, but it was your first animation. Just work on easing, and making the legs and arms more noticeable when they move... they just seem to move in one place then magically appear at another. Make walking tests, then running, then just keep on going up from there when you think you have come as close as you can from perfecting them. Read some tutorials on easing and walking, that should help too.