"What makes it compelling as a story and a character is his tremendous backstory, which sets up the character as someone who is different than everybody, but striving to help. That sense of somebody that is an 'other,' someone who doesn't belong but is doing his best to do the right thing all of the time. That's incredibly compelling and universal. All of us, no matter how much we feel complete, sometimes feel like we're on the outside, feel like we're alone, feel like we're strange and different. That's why the Harry Potter books and movies are so popular. That's why the X-Men are so popular. That's why just about every pop culture phenomenon you can think of is so popular.
It's amazing how many of the stories we love to cherish explore that sense of being different. That's a universal human condition. And the reason Superman, in particular, is so compelling is because he's on the outside, yet he's doing his best to help everybody. That moral core of the character is something that we all, deep down, want to aspire towards. It's that struggle to do the right thing that is really compelling. And it's not easy for him. I think that's another thing that great Superman writers have explored over the years. This is a guy that -- everything should be easy for him because he's Superman and he can do anything, but he is still in a constant struggle to figure out what the right thing to do is and how to do it."
-- Greg Pak, writer of DC's upcoming Batman/Superman series, explaining to Comic Book Resources what makes the Man of Steel such a compelling character