Originally Posted by def28
That's hardly alot, I understand not liking some of the extremes or when it's force fed but like you said even saying some of these X-Men were introduced in Avenger titles like Wolverine in Hulk. Rogues first appearance was in Avengers and she has strong ties to Ms Marvel. If it wasn't for some of these crossover overs or shared Universe we wouldn't have some of the stories we do.
That's just the ones I could think of off the top of my head.
Like I said, I'm sure there are more.