that light post in the corner takes away from the subject, and you should definately look into getting a flash. the front of your subject is pretty dark, throwing some flash at him would balance out the scene.
yeah all of what he said ^. but i love the point in the ollie which u captured him in. very good timing. it shows the technique used to ollie perfectly. if this were in a sequence, it would be perfect for a "how to ollie" article in a mag (fill flash would be necessary for this though).