Vista/Windows is an OS for the computer manufacturing industry which is in no way consumer-driven.
OS X / Mac is an OS for people who want the machine to work. It's not perfect, by any means, but it's way less hassle than ANY version of Windows.
After two decades of "growing up" with Macintosh computers, and using MS Windows along the way, I continue to convert friends and family to Mac OS X. None of them has ever expressed a wish to return to traditional PC operating systems like Vista or XP. Frequently they say something like, "Why did I wait so long to switch?"
If you want to read a summary of good logical reasons to consider switching from a PC, see:
Macintosh Basics