Let m start out by saying I am a DC fan and if this has been discussed before I apologize.
When comparing popular DC heroes and Marvel heroes it seems like DC heroes are so powerful that many of their tough battles don't seem as interesting as Marvel characters. Obviously Superman is the best example of massively powered to the point where you are always wondering when he will take the gloves off and end the fight. And almost at his level are a laundry list: Wonder Woman, Captain Marvel, Black Adam (in his hero days), Martian Manhunter, Superboy, Supergirl, etc. Green Lantern's ring can do whatever he has the willpower and imagination to make so you always end up wondering "Why didn't he just...?" Even the Flash could pretty much move to fast for anyone to react and phase a fist throught their head.
On the Marvel side you do have your Thor and Hulk (There will be no discussion of Sentry here) but many of the popular figures are believable when they are in trouble. Captain America just has a shield. Spider-man is much weaker than many of his enemies. Wolverine and other X-men all have many weaknesses so their teams are a matter of survival. In the end Iron Man is a guy in a metal suit.
As I said, I love these DC characters but let me know if you agree. Tell me if you see any flaws in my thought.