Some of them have too much shadow or emboss effect (Facetime, Messages, App Store), some of them look nice and fresh. I really hope that they will continue to improve those ugly ones during betas (QuickTime I am looking at you).
Apart from QuickTime the one which stands out most for me is Preview. It seems very out of place among all those minimalistic icons.
Apart from QuickTime the one which stands out most for me is Preview. It seems very out of place among all those minimalistic icons.