Aurelia

I hate pairings who try and push that "love at first sight," and/or "our first love shall be our epic last love" crap. A majority of the time these pairings ignore all the unhealthy things in the relationship rather than acknowledging and dealing with them, have no true development, have one person in the pairing holding all (or a great majority of the power) and as a result there is/can never be a true partnership, unrealistically act as though years and miles between a couple have no effect, and that they can never ever love anyone else (which makes the people look like users and insensitive jerk when they're in other relationships.)

Buffy/Angel
Veronica/Duncan
Lucas/Peyton
Clark/Lana
Dawson/Joey
Bill/Sookie
Edward/Bella(but then I hate all things Twilight)