This isn't a bad set!
1. The shadow on his face is bugging me some. The concept is okay, but I am not sure how well it is working for me. It seems slightly confusing.
2. Watch for the cut off fingers, the hands also look un-naturally large because of how close they are to the camera.
3. Probably my favorite. It makes me laugh. The exposure seems good.
You are very creative, keep practicing and you will continue to grow and get better.