I think that pretty much all of the mainstream country (Toby Keith, Alan Jackson... yeah, I'm lookin' at you) is terrible. Can't stand it.
However, I do
listen to some country - not much, but some.
Anyone who hasn't checked out Johnny Cash's "American Recordings" series ought to be ashamed of themselves. There's some absolutely awesome stuff on those CDs. His old stuff is good too, but his later works were fantastic. Loretta Lynn's new CD, "Van Lear Rose", with Jack White was pretty good - I'm not really familiar with anything else she's done though. Some other stuff I like is Lucinda Williams and some of Willie Nelson's stuff.
There's also some good "alternative country", I 'spose you would call it. Whiskeytown has fine CDs. Ryan Adams has even made some good stuff on his own (there's a great version on his last CD, "Love is Hell")... Wilco and Uncle Tupelo are usually bunched in that category too... they've made plenty of good CDs - I really like "Summer Teeth" from Wilco.
I'm sure there's some stuff that I'm missing, but I think I've covered enough.