You feel like your in a slump Huh, well Dr.Sp will tell you how to solve it buy a prove psd and learn from that and trying making a good sig. Well to your sig its nice except for the green border.
I looks good. The green on the left sets me off a little. And if you could sharpen up his hand and guitar a little it might give you some more depth.
xD that's what I've been trying lately but I'm so darn picky about PSDs, but I'll try finding a good one and just try using that for help