Bleak is a good song, but I definately like The Drapery Falls and Blackwater Park more.
It's really hard to fault Blackwater Park (the song). It's intention is to be a total riff fest, and that it is, so you can't fault it on being repetitive since that's the aim of riffs. It's not intended to be mellow, but it still has it's passages, so that's a few bonus points... etc. etc.