"The traditional DC characters have been perceived as dull and bland because they don't 'abuse' their powers the way that Marvel characters do," Byrne claims. "The appeal of Wolverine is not that he is a tortured soul who struggles against his inner demons. The appeal of Wolverine is that he cuts people up. The appeal of Spider-Man is (a) no matter how bad your personal life is, his is worse, and (b) he puts on a costume and goes out and beats up people who get in his way, which is what we would all really like to do.
The first murder
DC characters traditionally - but no longer - have instead put the costume on and gone out to do Noble Stuff. These days Batman breaks people's legs."
So in addition to Superman's enjoying his powers, he is also going to indulge in what Byrne calls "a very controlled 'abuse' of his powers." Byrne takes pains to point out that "abuse" is not quite the right word: "Superman would never abuse his powers; that's what makes him Superman." But within the limits he imposes on himself, Superman will get "tougher," Byrne says, with his adversaries than he has been in the past. It is this new, tougher, more aggressive attitude which Byrne is referring to when he compares Superman to Clint Eastwood's Dirty Harry in interviews.
"The subtlest example of this," Byrne says, "and my favorite Superman line in my stories so far, comes in the second issue when Superman's flying Lois back to her apartment and she says, 'You know where I live?' And he says, 'Of course, Miss Lane. I know where everyone lives.' And maybe he does. Why wouldn't he? He certainly could if he wanted to. It's Superman as Santa Claus: you'd better watch out."