I currently run FC1 on my laptop. I would have upgraded, but I'm in the middle of a fairly large (for 1 person) software project and I now consider it a "production" machine. Once this is finished (in the next month, hopefully), I'm gonna go ahead and upgrade to a 2.6 distro. I may also just wait until FC4 comes out in May.
Just got SUSE 9.2 Pro. I'm going to replace my Mandrake LINUX desktop with it and see how it goes before replacing Mandrake 10.x on my server.
I ran FC2 for a while (upgraded from rh6,7,9) - I didn't gel with rh's release cycle - i think it's like 6 months on the fc versions or pay for the new enterprise edition. However, It's more stable than their docs make you think.
knoppix and mandrake are on deck to be installed on other boxes soon, too. pick your poison!