The color of the background and the one of the brushes are clashing. They don't go well together. Your sigs are pretty much all the same. You seem to be incredible with wire frames and brushes, but you do nothing with adjustment layers. Try to work on that.
Alot of brushes used as from what I can tell, V1 is good and V2 has a enough brightness to show off the colours but it effects Spider-Man in the center. ._.