EDIT: Sun joined the OOo Aqua port after it was decided in OOoCon 2005 - it was not started by sun(kudos to Eric Bachard for the extra info!)
I think it was cool that
- A better native look: what are with the pinstripes? Those are way too pre-Leopard-like. Unify the interface and remove the pinstripes. And some buttons' sizes just look out of place. Also, try to use the unified toolbars (see iWork 08 for examples).
- Speaking of toolbars, some better icons on the toolbar, please: perhaps some of those Aqua/Pastel-like icons we see in NeoOffice, Adium, Grapher, Colloquy, etc. Don't forget the app's main icon - it looks nothing Aqua-like and needs some redoing.
- speed it up a bit.
I know, those are mostly aesthetic "bugs," but isn't how your computer looks a big thing about how much your productivity is increased? Usually GUI stuff is left for the end of development, but try to squeeze it in - it'll make a big difference.