Live.
I work in live music. I do 100 to 200 shows a year. Just love the soundstage of good soundboard recordings--capture the air of the venue and the energy of band when everything is right.
Most official live albums are crap. Still, some bands are releasing non-compressed discs that have a special energy. I applaud Pearl Jam for releasing every 2000 tour date under simple mix conditions (200 plus shows)and Tom Petty's recent foray into Blu Ray.
I know of many live bootlegs that are superior to the band's best studio efforts. I have incredible discs by Midnight Oil, NIN, REM, the Replacements, the Clash, Bruce Springsteen and U2 that just crush the studio versions. These discs are always on heavy rotation because they remain fresh in my mind.