Different OS's for different modalities. For desktop environments, I usually prefer windows 7. I think that Win 7 has some really good window management control

Different OS's for different modalities. For desktop environments, I usually prefer windows 7. I think that Win 7 has some really good window management control, and across multiple monitors often found in a desktop setup it works especially well. Apple hardware is top notch and robust. I don't need that in a desktop - my hardware isn't going anywhere (hell I don't even use a case for my desktops). For a laptop though, portability and build quality matters. So for those I'll buy Apple hardware, and thus use OSX as it integrates the best with the hardware provided. For servers, I like a light and lean platform, so I'll use linux. Requires very little maintenance, runs solid, and eats up very little resources. Right now I'm using Ubuntu on my two linode servers. I'm only hosting websites on them and seeding the occasional torrent, I don't need a custom setup. The out-of-the-box functionality that ubuntu provides works great for that. This is by no means and end all/be all rule, but for the most part I find that this is how I'm using my devices and OS's.