Lol. I felt really weird about For Tomorrow at the time. As a massive Jim Lee fan I also don't think it's his best character. But just the same I will continue to own every piece of Superman art that he does and in a somewhat comical reading I've come around to liking Azzarello's take. I think All Star Superman and For Tomorrow should have switched names.
I think Morrison's overrated in the sense that they couldn't offer enough Superman in a given story for me to say "THE best" although I'm pretty sure I give each storyline a solid 8.5 consistently