Linux-based OSs

What are your guys' thoughts on Linux-based OSs? Their advantages over Windows, Mac OS X, and other commercial OSs, and their downside.

Also, what do you think is the best distribution of Linux?

I think what >>13 is talking about is a bug that occasionally shows up in some distrobutions where fonts are unaliased. That problem is somewhat rare though.

>>16
"The Single UNIX Specification specifies vi, so any system conforming to the Single UNIX Specification will have vi." --wikipedia