one quick preface question, is this character supposed to be "cartoony" or "realistic"? or some combo thereof?
No offense intended, I hate to critique when I know I couldn't do any better(I can do manatees and swords in blender, but I can't figure ourt it's texturing and materials for the life of me...), but I have seen quite a few far out 3D characters out there.
....hmmm... the chest sems to lack definition, maybe extrude or "bubble"(however wings does that) some pecs, and possibly bump map some abs or a stomach? Also from a side view the head looks a little "ETish"(unless that is what you are going for if so
) maybe pull the face back a little.
Also some definative joints would improve the legs and arms IMO(unless you are going for a kinda cartoony "gumby look", in which case it looks great
).