Hey, nice to see you back after the holiday season, Julian. Happy New Year!
Hey, right back atcha, pal.
As it happens, I can't imagine anyone with Superman's powers wanting to lead anybody, or even understanding the concept: this fellow spends a lot of time on his own, and most of the time, he doesn't need anybody else to get by.
Well, this has a lot to do with the nature of Superman's super-hero club, the Justice League itself: their first instinct is to solve the problem by themselves. Contrast this with the Avengers, who have much more a team-centered dynamic. If Hawkeye or the Wasp spots trouble, their first move is tp duck behind an alley and whip out their Communicard.
Kurt Busiek explained the difference between the two teams as being the difference between the U.S. Olympic Team and the baseball team that wins the World Series.
It ought to be noted that Superman's capacity to inspire does not necessarily translate to a leadership position. Superman inspired the Legion of Super-Heroes, but except with a Deputy Leader position in Jim Shooter's run, he never went into a leader role.
This brings up an interesting point: why didn't the Legionnaires make Superboy their leader? Jim Shooter once said that "Having Superboy in the Legion is like having Abraham Lincoln in a club of contemporary politicians." Perhaps Superboy had a very different personality as a boy than he does as an adult, one less likely to assume the mantle.
(Personally, I always though Invisible Kid made for the BEST Legion leader; remember that time that Ultra Boy was to disobey him to peep on Sir Prize, and Invisible Kid socked him in the jaw, saying "I'll brook NO insubordination! When the Legion leader makes a promise, EVERYONE keeps it!")
If Superboy himself has any flaws, it may perhaps be found in a lack of ambition. What else would account for his sticking around a hick town like Smallville when he could live and fight crime somewhere big-time, like Metropolis or Paris? Perhaps achieving adulthood, something happens that fundamentally altered his character, making him gravitate to leadership positions in the JLA and leaving the city for Metropolis.
Note that this is different from Superman's humility, which leads him to adopt the nebbish Clark Kent persona when he could be rich and famous.
I don't want Superman to think of himself as a manager, boss, or world's greatest hero. He's a very humble man, in my view. When all the other heroes assemble around him and say "Well, what do we do now?", he says "I'm sure Batman's got a plan."
Batman is a pretty good tactician, although that's not the same thing as being a great leader.