Whenever this question is asked, you'll see a disproportionate number of responses from non Windows users (the information on market spread is out there, the vast majority of users use Windows), for some reason they are more enthusiastic about their OS of choice and love the opportunity to look down upon the Windows users. You might see Windows spelt as 'windoze' for instance, this is humour
Anyway, I use Windows 7 at home because I can play games on it and run MS office which I prefer to the free versions (I get office on the MS Home User Program, about £17).
At work I use Windows XP for the office bound stuff and Linux (Backtrack) for the security stuff I get involved in.
I get on fine with Windows 7, as I did with Vista - I never had any problems with Vista at all, though it became very fashionable to slate it. Even my family who are not IT literate in any way would slate Vista when they were running XP
