I'd say I want to hear everything; Clean, "Edge of Breakup", Bluesy/Rocky/Crunchy, and Flat-out Smokin'. Many times in my youth I went to the music store to demo amps, and tried all the "classics" that I was told were cool. All too often "Flat-out Smokin'" was more like "not quite, but almost entirely, unlike Angus Young". I like an amp if it'll Metal without pedals, but the Clean needs to have its own character, not just the "default before you kick the red switch". These days I can dig all the flavors from clean to extreme, and everything in-between, but fer Pete's sake, tell me if I need a pedal or not to make it zoom. Music store guy: "Well, you want a lower-gain amp so you retain more of the tone when you push it with an Overdrive pedal". No I don't.