I have experience with Ubuntu & several other Linux distro's (particularly Debian), as well as lots of Solaris, some OpenBSD and a tiny bit of OpenVMS. :) I particularly like old-school, well-built systems, such as Sun SPARCs, HP PA-RISCs and DEC Alphas, although it seems we've all gotta use x86 these days! ;-)

Oh, yeah, also Windows, of course. I use that too.

Recreationally, I like good books and good beers.