While chasing down Riley before he flys off, Buffy makes the off-handed wish "to go back to the beginning and fix it."

Oops

She ends up at the beginning of S4.  As she rekindles her relationship with Riley, she begins to understand that his insecurity about his masculinity and his ideals about feminized behavior have absolutely nothing to do with her.  Remember his "but you're just a girl' comment when she's on the bench?  As their relationship progresses she becomes more sensitive to his subtle attempts for her to behave more like a girl while noticing Spike's blatant admiration of her strength.  She wonders if she changes her behavior if it possible to win Spike to her side for the final battle against Adam instead of him siding with the monster.  Taking a chance she pulls away from Riley and starts supporting Spike through his difficult transition.  She also attempts to repair the other relationships in her life.

Would like to see some sort of unexpected threat arise that Buffy is unprepared for.

Riley bashing by Spike, cause that just makes me giggle.

Buffy finally growing out of her insecurities inflicted on her by the men in her life.