It's actually kind of amazing that they've managed to go over fifty, indeed almost sixty, years without giving his villains the sort of depth that most Batman villains, and even most Flash villains, have. You'd think they'd give some villains some depth by sheer accident in all that time. Somehow the bat-books manage to flesh out Batman's relationship with Alfred and the Robins while also making the villains fleshed out characters who can carry their own mini-series. Penguin: Pain and Prejudice is still one of my favorite stories, and that starred the friggin' Penguin. Meanwhile Iron Man has done so much pointless meandering and had so many restarts that ignored the meandering before that restart that it's somehow managed to go nearly sixty years without much of anything happening.