Very nice illustration. Conceptually I dont get what the little ghost things are doing there, and you probably could have done more with the pattern on the patch, but overall this turned out great, and has nice atomosphere.
I love how grumpy he looks given how awesome what he's doing is... the ghosts are a bit odd, but the patch is very cool and makes it much more unique and a touch retro seeming. Still, that guy could be in SO many shirts and make them rock... awesome man he is...
For the "ghosts," could you make them look a bit more like cumulus clouds hopping a ride with him?
funny that you ran out of characters for the title... and "come ride with me" just has so many bad connotations!