Characters redeem themselves all the time, whether it's for something minor (like cheating) or major (murder). However in recent years, some redemption stories have worked, while others....ehh. So, which stories in all mediums (films, tv, books, animated,etc) have worked, and which stories really shouldn't have bothered?

Best: Zuko from Avatar

Worst: Hmm...Deckard Shaw from the Fast Saga.