I thought Gurren Lagaan was an enjoyable series, but I still haven't forgiven Gainax or Anno for the bullcrap they pulled in Evangelion, the Kare Kano anime, and Puchi Purie Yucie. And I also personally think that any idiot that watches the Rebuild of Evangelion movies and gets disappointed gets what they deserve. Anno can go cry away into his little hole as a self-loathing otaku.
I also hate Naruto because the story has bogged down into a shitfest storm of hackneyed plotlines and characterization. That and it rips off from Ninku, Emblem of Roto, and Ushio and Tora.
Bleach sucks too, because of the fact that it, too focuses on craptastic fighting and superficial "systems" of ki manipulation through the usage of bankai. The only character I respect in that series was Urahara.
One Piece wasn't too bad until the C9 arc. I thought that the Alabasta arc was a great executor for a nicely done build-up of conflict and setting. I don't like the artwork though, I REALLY don't like how OP is drawn.