Top 10, 5, 3, whatever, just say it and explain why.
My list:
1. Kotoura-san: Terrible writting, Terrible characters. I'm not even sure if that first episode introduction was suppose to be satarizing or not.
2. Fairy Tail: Cliche shounen anime. Mediocre fight scene, mostly uninteresting cast of characters; I notice they like to give 'backstories' to a lot of them, but are they really putting any effort into most of them?
3. Boku wa Tomodachi ga Sukunai: Least convincing anti-social/people-that-has-no-friends characters. Harem, nuff said.
4. Xros Wars 2: Terrible writting, Terrible Characters. Probably had the worst ending out of the other Digimon series.

Note: You should probably go into more detail than I did.

School Days
Fairy Tail
That about it oh and
Tiger and Bunny

Any. *sits into chair and awaits the mighty text-walls of 13 year old boys*
Inb4 anyone takes me seriously, I don't watch anime, so I obviously can't hate it.

Elfen Lied (It's fucked up and I can't stand watching it. It disturbs me so much >.<)
When They Cry Higurashi (Fucked up, too)
Bakugon (A crappier version of pokemon)
Beyblade (Same as above)
Pokemon (It used to be good, but newer ones suck because of the uselessness of Ash's ambitions.)

Nuff Said.

Accel World and Rosario+Vampire = Both animes have weak and useless protagonist. But I hate the MP of Accel world more because he's a whimpy fat guy like rebellion

Quote from Hewitt

Uhm...it would be nice if you guys can explain why you hate these animes. Because this might very well be just another spam thread when there's a perfectly good anime thread over yonder General Discussion

I was thinking someone could just get a chance from an argument, but yea that would work so much better *hits head*.

Probably One Piece. I don't necessarily hate it, it's more of the fact that I dislike it. It's as if it takes episode after episode to get the show to trail on, as it trails very slowly.

I don't watch a ton of anime anyway, so I don't know as many anime shows as I'd like to know.

All the "sports" and competition stuff like bakugan, yu-gi-yo, and beyblade.

How come most anime girls wear skirts?

Quote from Ahmad9383

All the "sports" and competition stuff like bakugan, yu-gi-yo, and beyblade.

You mean the "old school" competition stuff. The new ones are epic B|

Quote from Invincitron

How come most anime girls wear skirts?

because it makes them smexy ?

What is Smexy?

Quote from Invincitron

What is Smexy?

"1. It can mean smart and sexy or very sexy.
2. Or a cute way to call someone sexy. It usually refers to guys.
3. It's common in chatrooms/forums
"That guy with the glasses is so smexy"!
"Wow...he is just so smexy!" "

"Smexy is a slang term of the word 'Sexy'. Commonly used be teenagers. Usually used in playfull, flirty conversation.
Sarah is looking very smexy today."

~UrbanDictionary

Quote from Invincitron

How come most anime girls wear skirts?

You're new at this stuff, are you?

Yep.