I want to be in full control of my hardware.
And I really don't want to manage more than one OS. I've come to realize that recently. I have Ubuntu installed on this machine, but besides using it for an extended time when I proceeded to mess up my boot files during the installation (and having difficulty figuring out how to even access the Windows Boot Manager again so I could boot into Windows)... I just haven't touched it since then.
Why?
Because managing more than one OS when one does just fine is a pain in the ass and something I don't care to do.
I might turn an old machine into a server so I can spread out my computing and play around with things like that, and if I do that Ubuntu will probably go there. I fear I may try and even dual-boot the server and mess around with a recent Windows Server OS... and I'll probably proceed to screw that up too.
But the big problem is: Windows 7 works beautifully for me, but keeping one system up to date is something I find dull and dreadful; I would absolutely hate booting into each and constantly needing to update both of them.
And I have my games, and thus I need Windows. Ubuntu, or OS X for that matter, can't do games without a loss of performance due to virtualization, and uh... I have this computing power to use all of it for the tasks at hand, I don't want to lose performance.
And that brings me back to my first point. I want to be in complete control of all the components. And that means no Apple. And if I'm not buying their machines, I'm not going to ever try using their OS on my own machine, because I'd have to buy it. The only OS I will buy is a new version of Windows, so the only other OS I will install on my machines must be free. I am not paying for two, hell no.
And I will most certainly never buy an Apple machine and then dual-boot it with Windows. That is primarily because I will never buy an Apple machine. Not because of brand issues... well, actually sort of. The brand tends to be ridiculously expensive, and the PCs and laptops they sell would fall under such label. Their mobile products basically set the standards, so... if that's too expensive, we'll never know, because their prices in said markets aren't
that much higher than the standard cost of entry for similar products (including hardware and features). But their computers? Shit... right now I could make a machine that would trump their next greatest release, and easily do so at less than the price of their current middle-of-the-road configuration.