Keet / Western Animation

  • Aang from Avatar: The Last Airbender certainly qualifies, particularly in the earlier episodes. He does undergo some serious Character Development, though, once he discovers the gravity of the circumstances he and his friends are in. His Keet-ness is taken Up to Eleven when an Earth Kingdom general, who is attemtping to invoke the Avatar State for military use, has him drink the Avaverse's equivalent of Red Bull.
    Aang:"IsitworkingisitworkingIcan'ttellsomebodytellmeifI'mintheAvatarState'causeIdon'thaveagoodviewofmyselfamItalkingtooloud?"
    • Though older than most examples, Bolin from The Legend of Korra has shades of this as well.
    • Despite being even older than Bolin, Varrick the eccentric businessman is more energetic and playful than most children! He's also a very successful businessman.
  • GIR from Invader Zim. His electronic robot voice coupled with his bizarre enthusiasm for everything makes him a very notable example.
  • Clancy and Ping from Julius Jr.. Both of them are generally excited over the littlest things.
  • Shifty Dingo from Blinky Bill. Especially when he's in a good mood. "I'm going to a party! I'm going to a party!" (bangs drum repeatedly)
  • Buster Baxter from Arthur is easily the most fun loving out of Arthur's friends. Whenever he's feeling down, it's usually for a pretty good reason.
  • Cliff, one of the two judges from the talent tv show "Wow!" from World of Winx is a definite keet, since, unlike his Grumpy Bear fellow judge Margot, he is excited by what the contestants bring to the show.
  • Wander from Wander over Yonder who is always happy, fun loving and upbeat.
  • Jack Spicer of Xiaolin Showdown becomes this temporarily upon being turned good by one of the artifacts. He spins and twirls, all the while talking about how being good puts the entire world at your fingertips. Needless to say, This freaks out the heroes and they want desperately to turn him back into the Big Bad they know.

http://tvtropes.org/pmwiki/pmwiki.php/Keet/WesternAnimation