Country music is like any other musical genre and obeys the 80-20 rule, ie only 20% of it is going to be worth your attention.
Just as blues is black American folk music, country is white American folk music and can be traced from it's roots via bluegrass and 'cowboy' music to the rubbish purveyed by mainstream Nashville, don't let that put you off.
Like blues, country is important in the way that it fuses with popular music, truly great bands like The Band and Grateful Dead would not have existed without country music, but then we would not have had the Eagles either so it is not all good!
Back on topic, the Live at Billy Bobs' series covers a fair range of country music, from the straight on bar room rock and roll of No Justice, the good time nonsense of Cross Canadian Ragweed to vintage 'outlaw' artists like Willie Nelson and Marty Robbins. It even includes some mainstream schlock to help you work out what is good and what isn't.
Oh, and the recordings and performances are usually pretty good too.