19. Mastodon, 'Live at Brixton'
Occasionally, listening to Mastodon was like having sex with a gorgeous, GGG (Google it) partner who insisted on changing positions every 20 seconds. But on this digital-only live monster, Mastodon's progginess is subsumed by a let's-call-it-professionalism that turns the band's twists and toggles into grooves. Career-spanning set, live video to boot — giggle about double-live albums all you like, it's your loss.