It's pretty close in most respects. I see what you mean about the eyes, but I thought that was part of the caricature. Too big? Eh, I though it was just supposed to be a "wild eyed" psychotic look, just like I asked for. Too dark? I don't think so. Too close together...? Okay, so maybe they are a little. ;)
I love the hair texture and the facial expression. I think the only thing that really could have stood to be improved composition-wise would be the removal of the "puffy" outer cheek, and a teensy little adjustment on the inner one like so...
That's pretty much all I can see to "pick on." The rest is great work. :) Especially the shirt logo, which must have been a pain to try to work with from the pics I sent. I also like that the character is thin... He seems to have been drawn at the weight I am right at this very moment, which is considerably lighter than when I sent the pics.