I'm going to be controversial (or probably not seeing the poll results) and say the 00s were way better for music than the 90s, which have a way higher reputation in most people's minds than they really deserve, in part I guess due to nostalgia.
I like a lot of 90s music, Nirvana, Radiohead, Blur, some Rap Music, Pavement etc but I think most Britpop was only kinda ok (Oasis being the prime example of a band getting way too big for one good album and a bunch of derivative singles), and it saw the birth of the kind of bland produced-pop boy bands like NSYNC that would come to predominate in the very early 2000s that just sucked entirely.
Meanwhile, the 2000s had some of my favorite artists come into their own, like The Strokes (Is This It is my favorite album), Arcade Fire (Funeral, Neon Bible in that decade, Arctic Monkeys, Kanye West, White Stripes, some great Radiohead albums (In Rainbows, Kid A, Amnesiac), and some stellar albums by Outkast and MF Doom. In total, I think pop was definitely pretty lackluster imo in the early 2000s and I think the 2010s will definitely be seen as the decade when pop became good (Drake, Beyonce, even Bieber releasing pretty good albums) but apart from that, where rock is concerned, the 2000s were a high point.