I am a strange person in that I am post-40 and still enjoy cartoons as much as when I was a kid. One of the more recent cartoons I have particularly enjoyed is the totally bizarre and seemingly pointless INVADER ZIM. Unfortunately, the show was just too weird and edgy for Nickelodeon and it was quickly canceled, though it has a very strong cult following. Apart from one season of shows, though, there just isn't much ZIM out there. And in light of this, I am strongly recommending Keroro gunsô (Sgt. Frog). The show is very, very similar in so many ways. BOTH star a totally inept short little guy who comes to Earth to dominate and conquer us for their empires and both are so hopelessly inept that they haven't a prayer! The only major difference is that Sgt. Frog isn't quite as bizarre or high energy. Instead of insanely over-the-top action like ZIM, Sgt. Frog is a slower paced and sweeter character--a lot more cuddly and cute than ZIM. Plus, for all you GIR lovers (he's ZIM'S robot helper), there isn't a corresponding character in Keroro gunsô. For this reason, I like this series a little less, but still recommend you give it a try.