I always have preferred the Pre Crisis Superman. Someone who has the next level of power than the Big Person Above (and yes we are not talking about the Spectre
)
The reasoning that he was
too powerful for good stories has always seemed more a cop out than any basis rooted in rational reasoning.
However, there is one amusing fact; remember that Superman could never materialize in his own life time if he traveled through time? Well, in that case he could probably never interact with the Legion of Superheroes in the 30th century because he might very well be alive into that age.