Fine. I wanted a general purpose system that could be used for anything. Games, movie editing, music production, programming, web design, you name it. I also wanted commercial-level programs which generally have more polish and functionality than their FOSS counterparts, in addition to open-source software when suitable. In Windows 7 I can get that, in addition to the feeling of being part of an extremely large and very well supported community who have an answer to virtually every problem that might occur, in virtue of the size of the userbase. In Linux I just feel like the lack of direction means that important stuff never gets fixed. I have no confidence with standby/resume in Linux, I have no confidence in tear-free video playback without having to tweak it myself, I have issues with the fact that I am not able to run programs like Photoshop/Office without WINE or VirtualBox, programs I want because they make life easier than the FOSS counterparts.
People have explained time and time again why Linux sucks on the desktop, but there's too much of an inertia and group mentality to ignore all the information that's OUT THERE ALREADY. So I can't describe it any better except by saying - it offers very little that Windows does not have except ideology and a very, very obsessive fanbase. I end up losing more by sticking with Linux then I do with Windows.