I find it very easy to be sympathetic to Superman.It's kinda hard to be sympathetic towards someone who can do anything.
1. He's lonely as shit. Batman lost his parents, but Superman lost his whole race.
2. He might have the power to do anything, but the fact is he can't do everything. There will always be more people to save, millions who will die while he's saving that 1 person. And he can hear all those people dying while he saves that one person.
The best Superman comics touch upon these two very depressing facts.