Come on, everybody loves a diss thread, don't we?

Probably a thread that has been discussed here ad nauseam by some of the veterans here, sorry guys, but here goes:

Great bands who have released truly rubbish music. Ob-La-Di, Ob-La-Da? Pop is Dead? Every Teardrop is a Waterfall? You know, the ones you're embarrassed to have in your music collection.