I've always loved Marvel. And I have to agree with Chris200. Marvel's stories alwaya build on the character. Leading to you knowing or understanding the character's complete story. For instance Wolverine.
Wolverine's first appearance was in the Hulk. I'm assuming maybe several years after he escaped weapon X.
Jump forward to him joing the X-men's second team.
Then they went back and explained the whole weapon X/ Alpha Team saga. Where he got the adamantium skeleton.
Then they go back to the conflict with the Hulk, since Wolverine is the best at what he does, hunting and killing people, they think he'd be the best matchup for the Hulk. Which led to one of the biggest events in Marvel History, IMO, when the Hulk rips his legs off and throw's them miles away.
Then they started introducing Major Villians from Wolverines long past, such as Lady Death Strike, Silver Samuria, Sabertooth and so on.
Then Magneto rips the adamantium from his body and you have the whole saga where Wolvy had almost no mutante ability except his animal instincts.
Then he gets recruited by Apocalypse and gets his adamantium back.
And lets not forget the entire Age of Apocalpse saga, which was great. Wolvy played a big part in that too.
I love the multiple reality concepts used. I admit it can get a little hectic trying to keep up with the multiple sagas and what not, but its still a cool concept.
The one thing that I hated about Marvel, is that during any specific storyline, you have to buy different titles. For instance, the story in Wolverine #45, may be continued in Fantastic Four #25, which is then followed by X-Men #302, followed by Cable #7, followed by Ultimate Avengers #2.