This argument has raged on for years, “why is Batman the best hero?” The common answer to this question is because Batman doesn’t rely on any super powers what-so-ever. He uses his strength and intelligence, as well as his limitless bank accounts, to overcome the corruption in Gotham. I think these traits are incredibly valuable to the strength of Batman’s character. But, I think we have a hard time relating to Batman because most of us are not billionaire playboys who are also great detectives and trained in the martial arts.
I think we can relate to Batman because of the way his heroic character is highlighted by the villains he faces. The most famous rogues that Batman faces feature aspects of Batman’s character or themes that he represents that are twisted and taken to the extreme. We see what Batman could have become if he wasn’t so noble and heroic. I think, to some extent, we all wonder who we would be if a single aspect of our character was changed or different. Batman and the relationships he has with his rogues gallery allow us to see character traits taken to their extremes.