Vista. I hardly ever use the thing anymore (I inadvertently woke it up from standby after about 2 days of not using it and discovered this. If I hadn't, I may well have not woken it until the weekend) and while I have, ahem, "enjoyed" the Mac experience, using this computer has just made me realise Apple is not for me. I just don't like the way Apple does things, and in using it I've come to appreciate the PC side of things more. Not only that, but never in my whole life have I had so many problems from a 6 year old machine. I'm absolutely strapped for cash right now, what with Christmas and all, and I'm DESPERATE to get Vista. While I will miss OS 9 crashing and OS 10 dinging at me, I can always buy a bigger, better Mac in the future when I have more money. Not that I think I would, but yeah.
With regard to those Flash drives, in order to get ahold of an 8GB or a 12GB one, the cost is insanely expensive, and to fit a dual flash card holder in that computer would be very tricky, as they are too high for the drive bay. So I'd have to either settle for much less storage than even my current POS hard drive, or spend an arm and a leg on a single large card. No thanks. I've already spent a lot on the machine itself AND subsequent upgrades. Enough is enough.
You can probably guess I've been procrastinating over this an awful lot. One minute I'll think "don't upgrade to Vista, and do up the Mac" and then the next I'll think "sell the Mac, and the rest of my junk and upgrade to Vista" and gradually I keep having the latter thought more and more. Windows delivers for me, and the Mac doesn't. It just... sits there. So realistically, my decision is set.