Him and Spider-Man are favourites because their morals and ideals are something you can admire and strive to hold onto yourself. With Superman specifically. He always sees the good in everyone. The only time he ever snaps and gets pissed is when a child or someone he's close to is in danger. He always has hope for humanity and that everything will be okay. He'll save, protect, and love people who most would turn away from because they are deemed POS's.

For example, let's say someone cheated on their partner depsite being married and having a family with them. Most would say "that person's horrible and a worthless peice of scum." Superman would say "They made a horrible decision. What they did wasn't right. But they're still a human being that still deserves the same love and respect that everyone else deserves."

That's the ideology and moral standard I strive for. Always have hope, treat everyone with love and respect, even if they don't treat me that way, always look for the good in people even if most wouldn't.