-I only use Linux for my server in the basement. (Ubuntu!) Works great, I have it set up to serve and backup files from my other machines, and record from my cameras with zoneminder.
-For casual and work I have always used Windows machines.
-Why in the world would I buy software for Linux, it doesn't make sense to me.
-I hate Mac. For me it never works right, is slow, costs WAY too much, freezes/messes up all the time, and doesn't let me do things freely. None of my other machines ever have any of those problems...