Right now on SL (11, I think?), with a Win XP VM for the few cases I have to use it, and various other distros as well in VM. I like to tinker, but Sabayon feels like it might be my new home after being so long on *buntu variants (though I've tried many distros, most recently Fedora, which *mostly* worked. I did also like Gentoo a lot when I installed it from a Stage 3 last year for kicks, so perhaps when I finally got an ISO to work (Sabayon X didn't like my machine for some odd reason, though it could have been a bad burn, too).
I like that you guys have picked pretty much all the apps I use as the defaults in the KDE variant.
A few really minor niggles (mostly really insignificant things, like one of the KDE styles losing transparency (but not the others, which is weird), but otherwise zero problems (mostly to do with themeing quirks).