Hey there!



I did some serious editing here, but please, I beg you to not consider edits to be other people "finishing it for you".
What I did here was take the information present (slouch, expression, beer t-shirt), and exaggerate it into a super-casual pose. I made the hands very large and expressive, and the legs bent to show a lack of tension. I tweaked all the shading, and cut down the colors to 12 from a much higher count. The guy is relaxed, casual, and cool, as shown by the hand gesture of an understated point.
I know this is probably very different than the "simple" style you had in mind, but I'm just throwing it out there as some food for thought! I hope it helps.

Keep pixeling!