@trace I completely agree on Bleach. I know people like slamming it for all its flaws but I can't help liking it.
As for the worst anime I've seen: For the longest time the bane of my existence was Mamotte Lollipop. I can't even remember why, it's just gone down in my anime career as the one that convinced me to never force myself to watch something ever again.
I also hated 11eyes. I doubt any of you even know what that was. It was so dumb and wtf especially at the end. I feel like it had a promising premise but was executed horribly. It has such a typical generic anime art style too. Also had one of the WORST female characters I have ever had the displeasure of watching in an anime. Had a cool opening though.
It's been mentioned already but Diabolik Lovers. Why in the hell did I watch it, I don't know.