I agree with WarriorDreamer. I understand the importance of realism and I highly doubt that anyone dislikes Raimi's version of the character or thinks that she was "unlikable" because she had her own goals. 616 MJ has always had her own goals and aspirations separate from her relationship with Peter. She's a fiercely independent character, and that's one of the things that makes her so great and so different from many other comic book love interests.
That being said, the "realism" of their relationship and of MJs character was handled very sloppily in the Raimi trilogy. In SM1 we really didn't get to know MJ (aside from being a struggling actress) like we got to know Peter. She was essentially just the archetypal "love interest" and damsel in distress. A girl that Peter had been in love with (for some inexplicable reason) from day one,the girl that he wanted to desperately win over, and the girl that he had to constantly save (I believe three times in that one movie). Once, we finally got to see the character and the relationship develop more in SM2 and SM3 she behaves very selfishly and bitterly. It's difficult for anyone to see what Peter sees in her because Raimi took away all of the positive attributes of the comic book character's personality : her charisma, her confidence, her effervescence, her charm, her feistiness, her sense of humor, etc; and imo her and Peter didn't really seem to connect on any level.
If that "realism" had been handled properly and MJ's character and personality fully developed, then more people would have/should have understood, forgiven, or even accepted her behavior (like they do with Peter, even though he can be a cold d-bag sometimes) instead of labeling her a selfish or jealous b*. Unfortunately (even if her actions may have been realistic or justified), that's really the only side of the character's personality that Raimi ever showed us.
And once again, Kirsten seemed to lack the right "energy" and "enthusiasm" for the role.
BTW, has anyone ever seen these pics of Kirsten from the SM1 screen test.
She looks absolutely stunning and just like the comic book character! They should have kept that look for all three films.
She's a naturally pretty woman, but it's amazing how makeup/styling can almost completely change a person.