Ask500

Dual-booting.

Ubuntu Gutsy - Very Satisfied

Windows XP - Satisfied.

Tried Windows Vista - dissatisfied

You forgot to add Linux to the list. According to http://www.w3schools.com, Linux has a respectable 3.6% share of the market.

I have Xubuntu Linux. I think Linux must be in the list :) Then I have Windows XP, Vista sucks!

Ubuntu - Very Satisfed

Windows XP - Quite Satisfed

Vista - Dissatisfed, Compiz Fusion is better(and faster :)) than Aero and Vista is slow on my configuration Athlon 64 3500,1GB RAM and Geforce 7600 too without Aero.

Mac OSX is the most user friendly and visually appealing operating system I have ever used.

Windows XP is the most common on the planet and therefore most people feel comfortable with what they know.

Linux is awesome because it is ever evolving. Every time I boot up my Linux machine there are new additions to the OS.

VISTA is terrible. It is a OSX wannabe.

I use neither of these operating systems.