Hmmmm... I have made a lot of money repairing "unexpected, ugly, and very messy" crashes on various incarnations of Windows computers... and a ton of money resurrecting them from various virus attacks which, generally, do not happen on Macs.
Your very limited Macintosh experience obviously includes absolutely no experience with OS X... which is brand new, completely different, from all previous Macintosh operating systems. My OS X installation has now been running continuously, without a crash for 15 months, 24/7. The only restarts required have been those when I updated OS X. Software installations do not require a restart.
I have a number of business clients. About 3/4s of them use networked PCs and the other quarter use networked Macintoshes, sometimes with a PC tossed in to the mix. I can asssure you that real world experience on both platforms tells me that PCs break down more oftenrequired more maintenance, and much more attention, than Macs. Several times I have had to rebuild entire networks of PCs when they were invaded by PC viruses before McAfee or Norton had provided the anti-virus for that particular virus (or because the network owner had gotten lax in following the procedures I set up to keep the virii definitions updated). Not once have I had a Macintosh network fail.
I have had individual Mac computers develop minor problems... but most were solved with a short visit. Hardware problems are no more difficult on a Mac than on a PC... and are less frequent.