The problem with Supes is that he has zero personality.
What a misguided assessment. Every character has a personality. It may not be a personality you like or prefer, but he still has one.
Is "being boring" a personality? Then fine, he has a personality.

@Temis...you say that Superman doesn't have any personality. What experience with the character do you have that would make you claim that?
I'm actually curious what you would suggest would make a good Superman movie.
Watching part of the Reeves movies (until I got too bored to finish them) and watching various episodes of Smallville (mainly for characters like Lex and Chloe, certainly not for Clark), which also bored me too much to watch more than four or five eps. I've made various attempts to read the comic books. I've never seen any iteration of Superman that could hold my interest for very long. If he has a personality beyond "boring blank," I've never noticed it.
I have no idea what would make a good Superman movie. I think the problem with the character is that he's intentionally boring - a blank canvas on which the reader/audience can project an adolescent power fantasy - so to make him interesting would require destroying the character in the process.
Christopher Reeve had a unique ability to make being boring seem interesting, if that makes any sense.

However, that kind of ability is rare. I don't think Henry Cavil is going to be any better in the role than the last guy was. It's an impossible role for most actors.