Yup, this echoes my expedience. Once I got compatible drivers for my video card (which took me about a day) I have had no problems at all with vista. It does what I want it to and does it well so far as I can tell.
I participated in the early and later beta testing, as well as Release Candidate #1, and found the OS to be reliable and well designed. However, the "quantum leap" from, for example, DOS to WFWG, or WFWG to WINNT, or WINNT to WIN2K, or WIN2K to XP, doesn't appear to be present in the XP to Vista "upgrade."
WINNT forced much of the OS to be entirely rewritten, due to it's (good) intolerance of violations of protected space, which violations were the cause of much of the instability which caused problems with the old windows kernel.
Vista is not that type of quantum upgrade. In addition, it has been loaded with a lot of DRM (Digital Rights Management) stuff, which requires more memory and slows things down a little.
It's not a "bad" OS, but not a great leap forward, either.
Linux continues to be an evolving platform and a viable option, and there is lots of software available at low cost. Many web servers are Linux based; TIVO uses the Linux OS; many dedicated systems are Linux based.
Microsoft may have the lion's share of the market, but by no means a monopoly.
Until Vista does something that XP, Mac, and Linux doesn't, it will be slow to be adopted, but it will, in the long term, become a new standard.
Keep in mind that, if one developes and sells a rock-solid OS, one does oneself out of business. Unfortunately, the successful marketing strategy appears to be to market a "fair" (as opposed to "good") product, and continue to sell "upgrades," rather than sell an "excellent" product in the first place.