DC comics is known for young-child level one-dimensional characters, and both Superman and Batman are from DC comics.

Marvel characters were always more human, and more adult. Spider-man was always more interesting, because being a superhero was much more challenging for him, being a normal guy with day-to-day concerns, rather than a billionaire.

With Superman and Batman, you always knew they were going to win. With Marvel characters, it was a lot more sketchy... The Spider-man movies, sadly, turned out pretty cartoony and childish, but that wasn't the character I knew. The X-Men movies are a better example... Much darker and edgier than even the reboot of Batman (which, again, isn't true to the character).

Other good examples are Blade, The Punisher and Iron-man.