Is there a particular reason why you dislike these storylines?
Originally Posted by Charles
In my experience, they can sometimes serve as a crutch. A player who feels lazy, or doesn't have a good idea, will often make up a background of revenge.
But I have found that revenge can be a very powerful motivator. Especially if it happens IC. One campaign I ran, had the party competing with some NPCs to see who would obtain a special jewel first. When the party arrived, the NPC party tricked them into giving over the jewel. When the party found out, the story took a very cool, very exciting turn as the PCs vowed not only to get the jewel back, but to get revenge for being made to look foolish.
"Wit is educated insolence." - Aristotle