Damn dude namin 5 groups to smoke to is hard. I like so many. CCR. Bob Marley, Pink Floyd, Phish, Hendrix, Rolling Stones, David Bowie, Sublime, Guns N Roses, Neil Young (very chilled music), Crosby Stills Nash and Young, Tenacious D, Eazy-E, Bone Thugs, OAR, the list will go on forever