My main vote was Spongebob. I've hated that show ever since it premiered, and hated it now. Here's why:
"I despise it because the music is bad (it just rubs me the wrong way), the jokes aren't funny (I've never laughed at any of the jokes in any of the episodes I've been forced to watch), and the characters (except for Patrick...he's fine) are poorly made (personality-wise, mostly). Also, sea sponges do not look like dish sponges.
It ties with Friends on my 'shows that are overrated that I'll never watch as long as I live' list."
As for that whole "Is Spongebob gay?" confusion, I honestly wouldn't care if he was or not. The cartoon's horrible, anyway, as I have said.
(Though, if Spongebob actually WAS a good cartoon, AND Spongebob was gay, I'd watch it, solely because it was actually a good cartoon.)
I pretty much just threw away my second vote to Danny Phantom, mainly because all cartoons on Nick are poorly made now.
As for the others:
Pokémon: Meh. I watched the earlier episodes, and stopped shortly after the Brock character left the show in the "Orange Islands" arc. Not a HORRIBLE cartoon, but I just felt I didn't have to watch it anymore.
Camp Lazlo: Never saw it.
Billy and Mandy: Much like Camp Lazlo, I've never watched it. I do know that Richard Horvitz voices Billy, and Richard Horvitz is an awesome person.
Codename: Kids Next Door: Again, never watched it.
"Japanese animes": LOLOLOL, the plural of anime is anime, and it's definitely not fair to just bunch all anime shows in existence all up as one choice.
Anime I do or did watch and enjoyed:
InuYasha, Cowboy Bebop, Trigun, Fooly Cooly, Lupin the 3rd, Detective Conan/Case Closed, and Pom Poko (though that was a movie).
Any other anime I don't watch, mainly because I either A) Have no time to or B) Am too lazy to actually watch TV as well.
And there you go. :D