At my own PC, I kept Win7 RC but I switched to Ubuntu as my main OS.
What I like at Linux is, Freedom as value (community and GPL based instead of corporate), free to use and share, free to hacking everything you want (from GRUB to Compiz), free to use the command prompt for almost everything (since I’m an old DOS junkie), and free to extensive use the source code compilation.
From the other hand, companies are just starting to support it, so if someone has to use Photoshop or similar apps, it has to stick to it’s current OS for his production line.

What I liked at Linux as a newby, was the learning process (I read and practised A LOT) and collaboration at fora (where I posted tons of questions)!
I suppose if someone doesn’t have the time for the learning curve and wants more than the basic tasks, just out of the box from his OS, then he don’t want (or he actually can’t) move away from his current OS.
On the other hand, learning something new, keeps you mentally alive, years after the school era (I’m 41yo.).

Well, I actually posted to say A BIG THANKS to you, to Rene and to all the developers and maintainers of QMC2!
Keep up the good work!!!
Best Wishes!!!

I run Linux and have a Windows XP system as guest in Virtual Box. It’s easier for me that way, at the cost of some performance.