I too have tried and left OSX
I just found it restrictive and it had several 'features' which I just couldn't get used to.
It's certainly looks polished, but it's far more of a 'Consumer OS' rather than something your average computer geek/enthusiast feels at one with (IMHO).
I reckon something like Ubuntu/Linux is far more in keeping with the feel of Amiga - so many ways of tweaking the look and feel and so many great free/shareware apps...
Mike.