What character managed to go from awful to awesome with perfect ease?S

Sometimes you fall in love with characters who start out seeming like total assholes or scary creeps. The transition may be gradual, or it might be the result of a big reveal. Which characters do the best job of going from repulsive to wonderful?

Please include pictures, video, links, or 3D printer plans that we can download so that we can always have that character close to us . . . always.