Why are you so defensive, most of us have been using photoshop for years, and believe it or not, we know what we're talking about. Quit insulting everybody who tries to CnC your *****. Did you expect us to say "Oh awesome!" or "That's the best thing ever"? That's not going to happen until you've learned how to make good pieces. How long have you been using photoshop, a week? You're never going to advance if you need to be so rude when people are just giving you advice.
Pick a better background stock, this one is too big. His feet are small, but the ground or background isn't isn't proportionate. Try to make the ground he's standing on look far away. Also, one more thing, don't forget to blend the background by adding some blurs.