this is gary. hes the imaginary friend that stupid drunk people threaten you with

love it :) I'd adjust the shadow a little bit - the shade looks awkward over the yellow tee. He reminds me of Strong Mad :)

nice style

in line wiv theangeli's point the shadow should be a brownish colour on a yellow tee. btw ur comment on the explanation of the design sounds quite funny. if u showd that in the design itself it would be even better.
(ie a drunk person lamely trying to threaten someone with gary clambering out of a squiggly thought bubble, maybe there's a whole gang of imaginary friends in the thought bubble vying to b chosen)

this is a cool character, it'd be cool if he had some friends or a background. something to make this more interesting

This guy's sweet

YES! however the "friends" should be a gang of nerds (for lack of a better word) standing behind him leaning out to the sides.