I think the pose is fine but you might want to make sure you know what you want your guy to be looking at. That would help out a lot. The way the clothes drape needs to be fixed. Only way to do that is to read and understand how they work. Heres a tutorial.
http://browse.deviantart.com/resources/?qh=§ion=&q=clothing#/d2wus71part 2
http://browse.deviantart.com/resources/?qh=§ion=&q=clothing#/d2wvb4zAs for the run; you shouldn't inbetween the arms as they fall downward only as they go upward. Right now when his arms come back down it looks like they are trudging through water. Actually now that I look at it is more so the spacing and less the frame count. Also I noticed you have 11 frames which is not even. It might be ok but it screws up the up and down body movement and in my opinion makes it jarring to look at.
Heres an edit
Both for comparison sake.
What I edited
yours
Oh and only the front arm is edited I left the back the same. The reason being because it would basically be the same and everything you need to know is in the front arm edit. Make note of the added rotation of the torso. An easily accomplished illusion by moving the shoulder with the arm. Oh and the head rotates too. It's really easy as long as you don't worry about the main form of the hair. Bangs, ears, mouths, eyes and facial details move as a unit. Simple as that. As for the legs I edited them both. What you had before was decent and featured pretty good arcs and spacing but I cleaned it up a bit. The biggest and most pain in the ass thing to change was getting rid of one of the frames. Took me awhile to figure out which was extra.
Also for fun I animated the hair. The easiest way I've found to animate hair is to take it a spike at a time. Animate one spike for the whole animation. Hair goes up when the body goes down(or rather it stays up because it's lighter) and vice versa. If you can make one spike animate well for the whole animation you're golden. By doing that you set up how all the other spikes will react. For example if Spike 1 is going down on one frame so will spike 2,3,4 etc and if Spike 2 is going up so will all the others. It's that simple. This also applies to clothing however you must take into account the weight of all your following objects.
One last piece of advice don't fully color in anything before it's fully animated. It is such a pain in the butt to animate fully rendered figures. If you made a cool sprite and fully colored it in a frame of hypothetical animation it is unwise to use that as one of your frames because you did not draw it to animate originally.
First you must consider how it will animate.
Second rough it out in simple forms don't include hair or clothing yet.
Third make sure the animation works and if it does base the hair and clothing off of it.
Fourth fill out the figure for each frame.
Fifth add the base color to every frame.
And finally after that is done work on the lighting/shading and basically finish it up.
Umm thats it. Oh and one last thing. Feel free to learn from my edit but I don't advise you to take it and call it your own and not because I'm worried of credit issues it's more because if you did that you won't learn anything. What I would like to see you do is use the edit and open it up in your animation program then draw a new figure right next to each frame and copy what I did. Don't blindly copy, figure out what I did and why. Remember to follow the steps above. Baby steps
Good luck!