too much of it is broken down. the name of the sig is guitar guy, or at least the guitar has some significance, but all i see is an over smudged hand and a guitar neck, both of which look out of place... i feel like hand and the guitar should be flipped over a vertical axis... like they're facing the wrong way... idk the position he's in looks physically impossible to me.
colors are amaaaazinggg i love those colors together, they accent each other nicely
background takes a little bit away from the picture. its too 3D compared to the 2D image that's supposed to be the focus object
too much white behind his face, makes him blurr away. i have no idea as to how it would work, but maybe try inversing that layer so that its black behind his face. the skin tone is already a highlight, but with an even higher-highlight behind it the skin tone melts away. accent highlights with lowlights, and vice-versa
text: not my fave, but its good. i like the color and the font.
the positioning is nice tho, good job @ that

overall i like it ^.^