Linux has come a long way in terms of being user friendly, theres still quite a lot of stuff I feel you just wouldnt have a clue about until you used guides on the neta lot of it isnt as easy as installing x package.
Problem is, there's so many good programs available for windows (Even ones that have Linux 'ports' or similar style programs are generally a lot harder to use in Linux), most wont run through Wine and VMware is kinda defeating the purpose of going 'M$ free'
If pushed I reckon I could go Linux only, but with Windows sitting a reboot away, I find myself sticking in windows.
A lot depends on what software you use. In my case anything I need to do in Windows [bar gaming/photoshop] can be done [better] in Linux. Especially programming. I use my laptop for Photoshop.
Unfortunately I need to go back to Windows to game. Although I don't often game so it is becoming less of an issue.