EDIT: Okay - the new version looks better now. :)
The pencil sketch looks really good. The computer version.. well .. the pencil sketch looks really good. Actually, Luke just said that, and is thinking the same way I am - colours and textures are bad. I'm trying to be constructive in saying this - that image wouldn't look good on a portfolio. Maybe a portfolio to show you know how to use Photoshop, but not a design portfolio.
Try using unified colour schemes, or colours that don't clash so seriously. Even opposite colours, but not red green blue and yellow all on the same beast. Unless.. it's puff the magic dragon. Get rid of the texturing nonsense, and bring in some of what made the pencil sketch good - the rich lines showing curvature and detail, which are mostly absent from the computer version.
Whipped these up in 5 mins to show some alternative colour schemes.

It's odd I don't like this one, as I've checked out your website before and like most of your other work. (Except the PlaySkills logo ;))
+BlackD