I was reading a thread about irritating characters and decided to go for something more positive. Just to make it interesting, I'm excluding the biggest: Superman, Batman, Wonder Woman, Martian Manhunter and any of the Flashes or human Green Lanterns (I guess there's nothing stopping you picking them, I'm just trying to give some others a little forum time).
Mine would be the Spectre. I like the idea of massive divine power given to a guy out of his depth and forced to play by the rules. I also like the idea of him going around giving ironic punishments.