Lookin great! Definitely captures the spirit of the Willis and one of the most iconic (imo) scifi characters of this past century.
Only crits i could offer would be the proportions of the head and face. The Willis is a larger than life fella 'tis true, but his build isn't as utterly massive as some of his contemporaries- So bout 1.15 - 1.2 of present scale maybe less. Head height for average Joe is about half the width of his shoulders an Bruce is no exception. As for the face, the elements are all there and masterfully executed, but don't seem Willisly proportional to each other. Thinking about it the eyes and mouth look alright, but the nose and um... muzzle(?) area seem a bit too large when compared with the other two. I could be off base on both opinions, so grains of salt are advised.
You're right about his bodysize. I first sculpted him nude so I'd have an extra anatomy model for my portfolio, and because he'd be covered in clothes I just went a little crazy with the generic male size; you can see it here. - [link]
I think I'll do as you said and pull some things in before finishing him if I'm really to capture the 'real' Bruce in this model.
As for the face it may be the perspective of the camera, but I did have a lot of trouble with Bruce's nose. (It looks to have been broken about 30 times haha) I'll go in and rework the area you mentioned after I've finished the clothing.