I like the big avatar box, I think it looks very well with the style
Ok, been testing avatar pics. It seems that no matter what size the pic is the style always places the top edge of the pic about 25% from the top of the frame.... so it is not aligning it central vertically but in a fixed position everytime. Horizontally it is aligning the pic perfectly.
Tested pic sizes from 10x10 through to 150x130, the top of each avatar pic is always 25% down from the top of the frame.
Hope this info helps.