i think the big difference between superman and wolverine is more then just attitude but their entire world themselves.
Superman is literally unstoppable unless the enemy gets a hold of Kryptonite which SOMEHOW even tho its the remains of a distant planet there is a vast abundance of it, or at least enough of it for every Superman villain to get his hands on it and hurt Superman.
Wolverine comes from a troubled past and as much as its very hard to actually kill him (there are a few techniques that would work) Wolverine can at least be knocked out / injured by conventional means (chemically induced sedation, blunt force trauma etc) he has a plethora of enemies that constantly provide new and unique attack methods to try and take him down and Wolverine doesnt have a ton of powers to make him virtually invincible, he has to rely on what he has and his intelligence to try and defeat his foes (being a close quarters combatant is harder when you dont have laser vision and what not)