I love live stuff. The jocks on the radio always get stuck playing the album recordings. It kinda sucks, because if you are into the classic rock there are not many new recordings being made unless the old groups are touring. Trust me, youtube & a capture program are your freinds in this regard. So my short list in no particular order is:
Queen: Live Killers
Blondie: Live from NYC
Billie Idol: In Super Overdrive
Martina McBride & Pat Benatar: CMT Crossroads
Alabama: Live
Garth Brooks: Double Live
The Moody Blues: Live at Red Rocks
Paul Simon: Concert in the Park (from 1991)