I'm a cross platform person who uses OS X on an iMac and iBook at home and Windows at work. Until January of this year I used Windows at home. I can tell you that I have to reboot a minimum of two times a day at work, and up to five times on a bad day. The Win2K server has to be taken down once a month for about 4 hours for our IT people to "figure out" why its not working right. Probably has something to do with the fact that the ONLY thing we use it for is to run Microsoft's Great Plains Dynamics accounting software. Now that thing is a true POS (typical MS). We spend roughly $1,000 a month above our service agreement to have our Great Plains resource partner come out and fix corrupted data files. And for those who say the server and/or software "must" not be setup properly, all I can tell you is we spent roughly $10,000 last year having multiple consultants come out to re-set everything up.
At home my iMac stays on 24/7 with no apparent problems. I'll admit that MacOS pre X was not any better than Windows IMHO which is why I waited to convert from being a 10+ years PC person until this January after 10.1 had been released.
P.S. my point is that I use both operating systems, thus I feel somewhat qualified in making a judgment on each's merits and stability, as opposed to others who maybe saw a Mac in a store once and now feel they can say "Macs suck"
