Here's what I wrote in my Legend Of The Guardians review.
...yeah, it’s all just about as goofy as it sounds. But Snyder never winks. Never comes close. I don’t think he has a winking bone in his body. It's his saving grace, his secret weapon and Achilles heel all in one. It’s the reason he can make something as melodramatic and broad as 300 really work. And also the reason why, though it’s intentions were noble and sections of it brilliant, Watchman did not. He lack’s Moore’s dark irony, but has Miller’s true believerism. Indeed Snyder is perhaps the most deeply unironic filmmaker working today, and I for one find it his most endearing quality...
And that is why he is going to be THE perfect person to make a Superman movie.
The fact that he's already proven he can handle some kickass flying based action doesn't hurt either.