I use Solaris 9 at work. Hopefully we'll get to ten soon.
I had a play with ubuntu a little while back but went another direction.
As I'm sure you all know I use a Mac with OS X which is essentially a version of BSD. I call it the flashest Linux distibution out. It has the advantages of linux with a to-die-for GUI and good hardware support. If anything isn't supported I can use linux gimp drivers :)
Sensational wrap up of linux JD :)

