Actually comparing Snow Leopard to Vista would be a compliment to Apple. Currently, I use my Mac maybe 60%, Vista 48% and Linux 2% of the time I am working. There is much to appreciate in my Mac but so many applications crash with a complete loss of data (two of the worst offenders are Safari and MacSpeech Dictate). Apps crash on my Vista machine but I don't lose data and the crash rate is far less then I now see on my Apple.
Contrary to Apple propaganda, I find the matured Vista is more stable than Leopard. It will be interesting to see if Apple gets the traditional free ride from the press on Snow Leopard issues. As always will wait 4 - 6 months to take the bait and hope MacSpeech gets its act together and Apple fixes Safari.
I think you are in the minority on your Vista vs. OS X comparisons. Having used both for over a year I can't say that I see the positives of Vista.
While Vista is fairly stable, it is infuriating to use, slow, bloated, etc.
As to OS X crashes, I don't know what you're doing wrong, but I don't get the perception that most users are experiencing major crash issues with OS X.
I use Adobe Lightroom for photo work, use MS Office, VPN software, etc, on my iMac and I have literally not had a single crash on the machine in the six months I have owned it.
Methinks thou doth protest too much.