I really like your character alot too as well... however justl ike matt the man said.. the knees.. however, if we saw it in motion and it moved organicly then maybe that wouldnt be a problem. May i suggest adding a few different things to his skin? Forexample, bulging veins and skin imperfections. Maybe a lil more bruising because he moves a cart around all day? In my opinion, like matttheman said, maybe add a lil deformation to show he has bones near or at the joints. It would shape him up nicely. Maybe pull his toe nails out a little bit so its feet isnt so round. Saime for the eyes, a lil deformation.
Its a rally cool character man and I would totally keept it up. I like it a lot. I think if you keep going with it you will have something here
You shoulda just goudged his friggin eyeballs out. That woulda been funny!