OS X purty - fonts, resolution, and you haven't seen TeX until you've seen it on OS X.
The keyboard is really hard to get used to, though. Just where it is in relation to the trackpad, etc. Mostly because now I have to do all the things I used to do in Linux on OS X, and the setup is really different.
But hey - I finally get to discover what gunn and the Valrus knew all along - Macs aren't so bad. Now. Anyways. Whatever.