I started with a ububtu box (ubuntu 10) in a crappy laptop. And was very usable and fun. Loved vim and gnome 2. But some times the system went a little buggy and with a bit of effort i bought a MB unibody(the first model) since then i use osx. More than once i had to jump to linux and its fine. But every time i had to use eindows i cand stand it. A couple of years ago i was diagnosef with LHON and started to lost my sight .( not completely and now im recivering it) and ctrl+scroll with inertia zoom integrated into te system had keepeeng me still in the game of development. A similar tool also is integrated in the iphone.