Leporidae wrote:
Sgt. Frog is a must for anyone who likes strange outcomes

Agreed. Sgt. Frog is currently my favorite anime/manga. It was supposed to come out in English in America last February, but for some reason it got pushed back to later this year. So until then YouTube.com is the only place that I know of that has English subtitled episodes of Sgt. Frog that you can watch. I also highly recommend it.
I also think that Bobobo-Bo Bo-Bobo (or Bobobo for short) and both Yu-Gi-Oh! series' are good.
Bobobo is filled with very nonsensical humor but it only lasted 2 seasons (probably because a lot of people couldn't handle that kind of humor).
I'm not sure how I can briefly describe Yu-Gi-Oh! and Yu-Gi-Oh! GX without giving you the wrong idea. I think they're good but I've noticed that a lot of people on the internet have critical opinions about the American versions of Yu-Gi-Oh! and (especially) its GX spinoff.