In reply to ByEek:
Yeah, well, the flaws in the 'crap' ones do tend to get exaggerated. The fact that they made it past MS's quality control and out the door means they must have worked OK for a fair number of users. Market share and uptake does tend to follow the pattern of good-bad-good though. To elaborate a bit more on my experiences:
95: Yes it was buggy, but it was the first simple to use windowing system for home users.
98: Only worked with this on one machine. BSOD every time a USB device was plugged in. BSOD quite a lot of it's own accord.
98SE: fixed the above problems, with little other changes. First consumer OS with actual functioning USB support. I may be cheating a bit by separating this out from 98, but hey, Microsoft wanted money for the upgrade.
ME: Only saw this on one machine. Unmitigated disaster and I don't think many would disagree with me on that one.
XP: some teething trouble, but really very good after SP1. NT kernel, no 16 bit gubbins lying around under the hood. Journaling file system so it didn't get into a mess if the power went out. Some actually functional security stuff, even if most people didn't use it. It's quality is demonstrated by the fact it still has >20% market share 13 years after it was released.
Vista: There were a lot of good changes in vista, and some of the panning it got was undeserved. A proper security system, including UAC. Proper, functional, multi-user stuff. Superfetch is great. Let down by published minimum spec that was less than the realistic minimum spec. The SP1-boot-loop bug didn't help it's reputation much either. There are (were?) a lot of really stupid bugs in vista too, though admittedly many users would never see them. You could create long file paths in explorer, but not view or delete them. If you created a NTFS junction, then deleted it, it deleted both the junction and the original files!
7: There are very few changes under the hood between vista and 7. In many ways, 7 was all the changes in Vista, but done right. Shell improvements, bug fixes, more sensible out of the box configurations all made a difference. As did 3 years of hardware improvements but little or no increase in hardware requirements. This one will be around for a while.
8: Not used it. Just jumping on the bandwagon with the haters.
Anyway, enough thread hijacking.