Avatar: The Last AirbenderM. Night Shyamalan made of this franchise but you may have strayed away from the actual show because of the "kiddy" nature of it. I know after watching the first episode, which consists of penguin skating, can put someone off but you should really give yourself a few episodes before judging too harshly. Now this show falls into some cliches children's shows sometime run into like special episodes pushing a lesson that is obviously telegraphed within the first five minutes. Also the show is based on traditional Japanese anime shows so some of the quirks of anime appear but to some comedic affect, nothing to heavy just stylized choices overall.
Despite some negatives, overall the show presents a deep mythology and well rounded characters. The mythology has four different elements, fire, water, earth, and air, which people can be used like martial arts. The characters are really the best part of the entire show, they develop and change, they have interpersonal relationships, and just like normal people their past heavily influences their choices and actions. What first feels like typical characters filling in typical slots for any show does apply, but one character may appear to be the wisecracking friend he also serves as the "idea man", two stereotypes that don't always mix.
So if you like some traditional animations or kung-fu/martial arts you should try Avatar: The Last Airbender out. It's on Netflix instant streaming yo.
Star Wars: The Clone WarsGary Whitta. And when I saw this show advertised on television I assumed, like the prequels, this would be a pandering attempt to get children to watch more shiny lasers and cute aliens. I won't deny that this show certainly does pander sometimes to kids and it runs into the problem of having a "lesson" in every episode that you can guess about 2 minutes into the show. But if you like Star Wars you may enjoy some of these episodes.
The CGI animation isn't something I enjoy too much but it gives the show a bit more of a science fiction feel that traditional animation may lack. The characters aren't very deep and are entirely predictable. The story lines though fill in some backstory between the prequels that I find more interesting than the movies themselves. You get a bit more in depth with some of the Jedi only seen in the movies which expands the universe a bit further.
Clone Wars show isn't your thing but something like Avatar is (or you just don't like "kids" stuff and want something more adult) check out the Genndy Tartakovsky show/mini-series made in 2003 called Star Wars: Clone Wars. I think Genndy was given more creative freedom with this show whereas the laster CGI one is written by Lucas' daughter a lot of the time and keeps strongly to some of the problems that plagued the prequel movies.