Linux then vista then mac. Then again, I don't like any recent Mac OS, so of course I'm biased. Just like people who are pro mac are biased because Windows is "Too hard" for them
Macs are PCs, there is no significant hardware difference anymore, Mac gave up the one thing that made them unique and superior hardware wise. How many viruses do people who run up to date AV software get? Not many, if any at all, and I can get the AV software for free legally(thank you, Avast). Also, someone just recently made a malicious program that destroys Mac OSX, and considering most Mac users don't run AV software, they're wide open. As for which is a pleasure, that is subjective.
okay but vista's are 200x better
that was 2 years ago now we have sp2