well, as far as mainstream music, this generation is better than NSYNC, Christina Aguilera, Britney Spears, Backstreat Boys, Korn, Limp Bizcuit, Kid Rock and other horrific shit from the previous era.
90's had pretty good standouts in rock and hip hop - East Coast/West Coast rivalry, the rise of alternative music, R&B Soul - Lauren Hill/Fugees
80's had probably the height of pop/dance and a lot of rock, emergence of hip hop - Michael Jackson, Prince, Madonna, ACDC, Metallica, hair bands, Run DMC, Rakim, Public Enemy, Beastie Boys, NWA
70's - lot of folk music and rock - Led Zepplin, CSNY, Jefferson Airplane, Eagles, Queen, Pink Floyd, Marvin Gaye, Stevie Wonder, Van Halen, Black Sabbath, The Clash, CCR, Bob Dylan, Bob Marley, Blondie
60's - Beatles, Elvis, Motown, Rolling Stones, Woodstock, Joplin, Hendrix, The Who, Grateful Dead
imo, we kinda got screwed as far as mainstream music goes, 60's, 70's were spoiled.