I can't say I'm a fan of Spongebob. I liked it when I was younger, but I as I got a little bit older I just stopped watching it all together.
I've seen almost a full episode of Kid's Next Door, and I didn't like it at all. No big reason, I just don't.
My opinion is the same for Camp Lazlo.
As for Danny Phantom...I enjoyed it when I was a bit younger, but now I don't watch it anymore.
Billy and Mandy: No. Just no.
(edit) Anime: I really don't mind some of it. Shows that I enjoy are Case Closed, Fullmetal Alchemist, Lupin the 3rd, and Cowboy Bebop.
The only shows I'd ever try to watch on Cartoon Network come on on the [Adult Swim] block. And those shows include: Family Guy, Aqua Teen Hunger Force, Futurama, and Robot Chicken.
When it comes to Pokemon, I think the games are enjoyable, but the show just isn't good at all to me.