I think the base is my problem with this piece. Hulk looks very comic-come to life and still retains a bit of a fantastical quality to him, but the street rubble looks like its sticking too close to naturalistic styles. Its a contrast I don't like. Obviously you've done an amazing rendering of everything and the focus is right dab on hulk, but its that hunk of rubble in his hand that makes my eye confused and then makes me look at the ground in more detail.