Designated Hero: We're supposed to root for both the leads even though they have no problem doing something so nasty to another person that could damage their self-esteem and ability to trust.
Jerkass Has a Point : Andie's boss at the magazine. It's a magazine devoted to fashion, makeup, and how-to articles. Why would Andie think "serious journalism" has a place there? Didn't she read the magazine before she took the job?
Why Would Anyone Take Him Back?: A double example in which both partners start the relationship under false pretenses. Both halves of the deception are revealed; both parties are hypocritically furious and dump each other, then decide in the end that they're meant to be together after all. Though it could be argued that in that case, they deserve each other.