All three have there merits, but 3/4 profile seems the most pleasing and I think it's because of the eye being more visible.
Pleasing to the eye the profile would be my pick. Which looks more eye catching? the 3/4 would be my pick.
I agree both with the pick and the question of saturation. The first would also need substantial cropping--I would get rid of a lot of the leaves on top.
3/4 strikes me as the best. The head-on view is curious... Makes me look twice. With really narrow depth of field centered from beak tip to eyeball and zoomed way in, it could be a really unique shot.
For me it is fairly close between profile and 3/4 with 3/4 drawing ahead because of the clarity of the eye, which has been pointed out already.
Thanks guys...sounds like we're on the same page.