Okay, I know that I've talked about this repeated, but... I HATE MICROSOFT WINDOWS!!!! I especially hate Vista.
It is SO infuriating to start Windows up and have to wait a minute or so before you can start up Outlook or some other vital program. This isn't just a matter of having an older computer, mind you. The problem exists even on newer models.
And heck, even when you do start a program up, you might see it freezing repeatedly before it can do anything useful. I hate having to start Outlook, starting to compose a message, and then finding that the software keeps freezing while you're in the middle of typing a word.
And why does this happen? Because Windows is bloatware. It contains so much gee-whiz fluff that vital performance is slowed down dramatically. And why? Because Windows designers put way too much performance on kewlness, that's why.
Darn it.