Of course, fast major-key songs are not necessarily happy. And complex minor-key songs are not necessarily brooding and intelligent. But -- ha! -- it might take eight seconds to figure that out. And who has the time?
Do artists have a responsibility to push their fans into new and exciting territories? Is there anything wrong with giving your public exactly what they know they want, if it remains true to who you are? Does embracing mass popular culture somehow harm your credibility as an artist?