Neither have I, or will.
But I did have a Ubuntu computer, of course when they started imitating OSX I had to switch OSes (yay ArchLinux) -- if I wanted a Mac lookalike I'd get a Mac.

I learned more than I wanted to know about interfaces that I don't find appealing.
EDIT: To clarify for lurkers, I didn't have to switch OSes, I could've just switched desktops. But I no longer trust the company behind Ubuntu to have users' best interests at heart.