Mac, Windows, Or Linux?
arjungmenon: I use Windows Server 2008. It's an excellent operating system. It's very fast, very stable (has never crashed), e.t.c.And above all I can run 90% of all the apps in the world (I'm guessing over 90% apps are for windows).If you want to use Linux, run it in a VM on Windows; or use Cygwin for basic apps.