Linus Torvalds explains why he uses Fedora Linux.
He wants to be able to easily compile and run his own kernel, and wants everything else to "just work". He also mentioned he was running an older version of Fedora.
For a tech geek icon, he is remarkably anti-hype and very pragmatic. So he uses Fedora not because of how great it is (it is), but because it is the best suited for his work.
ps: Torvalds was failing to register "btw i use arch" meme.