I'm kind of the same. I still use OSX on my 2007 MBP for portable, and I'm using Awesome WM with Ubuntu on my desktop. What other kind of tiling WMs exist and/or what do you use?

I still switch to Windows occasionally for gaming (although I try to limit my gaming habit). Another reason for using Windows for me would be screen capture software (Webcammax [best], Manycam, more...) which is completely absent from Linux (hint hint, elementary. I think this could be revolutionary).