On a whim I did some Google searches:
“I love Ubuntu” ~41,200 hits
“I hate Ubuntu” ~1,680 hits (~4% of Ubuntu love)
“I hate Windows” ~61,100 hits (~163% of Windows love)
So using this unscientific poll, we can surmise that people’s experience with Ubuntu is generally far more pleasant than with Windows ;)
In a slightly related note, Bill Gates seems to be cementing the Vista-as-Windows ME 2007 reputation by claiming that “Sometime in the next year or so we will have a new version” of Windows. Never mind that its complete vaporware at this point; perhaps he thinks the message he’s projecting is that “I’m super-enthused about what [Windows 7] will do in lots of ways”… yet what people are actually hearing is ‘avoid Vista’; the results are predictable: people will stick with XP for now if they can, get a Mac if they can’t or maybe even dabble with Linux; Hardy is looking so pretty that it absolutely blows away anyone who hasn’t looked at Desktop Linux in the last couple years (and the EULA can’t be beat :).
[Update: for more unscientific fun, see the comments ;]