Love Six Feet Under and can't wait for the new season to start. Aside from Whedon's stuff, this is the only show that's really captured my imagination (and not been cancelled immediately) over the last few years.
Great writing, great cast (both the brothers + Keith=hotness), good guest stars and nice art direction. Besides, what other show's pilot episode has the daughter hearing of her father's death while she's messed up on crystal meth?
I was only watching the first season so far, and I thought the show was just phenomenally good. I think the last time I thought that about any TV show was when I was watching "My so Called Life", and that seems like ages ago.
Actually, now that I think about it, I think that the only other non-animated show I care about right now is 'Monk'.