I use Linux myself - usually Xubuntu, or, depending on the hardware, at least any Debian-derivative with Xfce as the desktop environment. I really like and get on well with Debian and Xfce.
I've tried a couple of times to fully move over to Linux, specifically Ubuntu or Xubuntu (and on the older stuff, Lubuntu), however, whilst OK on a couple of machines, on a couple of laptops, I simply cannot get it to install no matter what - the usual problem is X not recognising the graphics hardware properly. I tend to find it just crashes or displays a blank black screen and even Ctrl+Alt+F1 to drop to a console does not work (hence, why I assume it's crashed)
Admitidly, the laptops are old (early Pentium 4 era or late Pentium 3 era) with naff graphics chips (I have a Toshiba Satellite Pro 6050SP with a "Trident CiberBlade XP" graphics chip, and an IBM ThinkPad T22 with an S3 chip of some sort, neither of which will work with any Ubuntu or Debian based distro - not tried anything else)
The success with laptops, is I have a Dell Latitude D610 in seriously bad condition (it's quite literally dropping to bits) - this runs Ubuntu 12.04 LTS like a dream. I still keep a partition with Windows on it though, as I've not found a satisfactory replacement for iTunes (I know there are iPod/iPhone tools for Ubuntu, but none of them work to my expectations)
Personally I'm getting fed up with Windows. I hate Mac OS X but Ubuntu seems like a nice OS to me, shame it doesn't want to work on half my hardware.
Whilst Windows is my main OS (and all my 'work' is based around it), I do have an Android-based tablet, an iPhone (obviously running iOS) and a Raspberry Pi (running Raspian, a Debian derivative)