I really like the big hide in the middle, the shades on the eyes, the hair, the lips, looks like a photo of him. The small one...well, the proportions, the eyes are too small or everything else is too big, I think it's the size.
for the one on the bottom...
looks like he's doing something dirty Yoshiki turned out very realistic again, you're the queen of the sketches
Oh and one thing, could you please put the last two as thumbnails? They're a little too big in my opinion.