Some friends convinced me to have a go on windows 7 saying it wont crash more than OSX and its easier to use... really? It crashed within the first 10 mins of use. It wouldnt even open a large maya file. I even tried importing it as an object but it crashed after 20-30 seconds of it opening. This was in a brand new bay of PC's. It may be down to me being too optimistic about a new so called perfect version of windows, but it was terrible.
I don't think your experience was at all typical. In my experience Win7 is very stable, at least as much as an OS with a system registry can be.
I've always built my own boxes, and for a long time used a hackintosh system. Over time I incorporated more and more OSX software into my workflow, and I eventually bought a Mac Pro. I know folks get militant, but I won't ever go the hackintosh route again. It's too much of a pain to setup, and something as simple as a CPU upgrade can break it anyways. Bottom line, if I am using the machine for work.. I need to be able to recover it ASAP after any type of potential disaster. I couldn't be certain I could do that with the hack route. It was fine when it was working though.