My desktop and all servers run Linux (Ubuntu) the notebook is Mac OS/X and the home PC is Windows (the wife can't get her head around Ubuntu nor OS/X). All the applications I write run on all three platforms and I spend more time in a browser (FireFox/Chrome/Chromium/Safari) than any other program. Oh yes, I use both OpenOffice and iWorks. Write complex documents using Latex / Lyx which in turn run on all three OS.
Does the OS really matter that much these days? I use OS/X on the notebook because everything works! Could only get 90% of stuff to work reliably on a HP notebook (C700) with Ubuntu. The Mac Book Pro cost three times the HP, but it's worth every dollar in saved time. Don't get me started on how much Vista kept getting in the way as originally shipped on the HP.
