re: Why do so many people here like crappy music?

Regarding older music–music from the 60's to early 70's, let's say–at least there's some consensus on who the top bands were: Beatles, Stones, Kinks, Who, Byrds, Dylan, Jefferson Airplane, Doors, Hendrix and Led Zep would be on just about any list of top artists of the era.

That doesn't exist today. The music scene is so segmented that it's much, much harder to create a general standard of what good music is--and who the top artists are. Each musical segment–metal, rap, country punk, Mongolian psychedelic–has it's own standards, but the agreement stops there, at what each small segment enjoys. The definitions of "good" and "crap" are inward looking and self-contained, hardly the basis for getting a global perspective on things.