Does hentai count too?
Well, the regular animes that I didn't like are:
- Strawberry Marshmellow; Too cheesy, I couldn't stand the girls constantly "aww"'ed. I guess it's a good anime for girls though. I didn't watch it all the way through.
- DearS; Well, a nice J-pop sound track, however, the anime had imo way too much of the "childish non-serious humor". It was also very easy to guess the ending, resulting in much of the excitement went away.
I have tons of bad hentais, but I guess they don't fit in this category.
- llonell