I am reading this thread on FedoraForum, it's too funny to ignore. I picked up few and shared here in order of how I like:
  1. “Fedora: to boldly break things that no one has broken before.” — posted by Shivas
  2. “Fedora: To boldly go where no Penguin has gone before.” — Zigzagcom
  3. “Fedora: Hold On to Your Hat, It Might Be A Bumpy Ride.” — Hlingler
  4. “Fedora: Get in, buckle up, hold on and shut up.” — Dan

I believe that they were inspired by “Why is Fedora always seem to be broken?” and I agreed with them, but I am still a Fedora user.