I realize you're doomed to be downvoted into oblivion, but I have to agree - I had a tough time following someone whose logic is "OS X is pretty dated and ugly looking... it's back to KDE for me".

There are certainly fair points to be made about the inability to customize certain aspects of the window manager -- coming from a long-time linux user's perspective, it was one thing I immediately missed -- but I'm really not sure "ugly design" is one of the criticisms I could make.