a gift-curse

Here's a plot-inducer, more than anything.

You character has been cursed (somehow), but that curse doubles as a gift.

For example, if they can see into the future, then for every time they use their Sight, they forget a memory of the past.

Or if your character can heal rapidly, then they start to lose feeling in the injured area. Eventually, they can't feel any part of their body. This would be really sad in a novel with romance. Sex just wouldn't be fun.

Or possibly, your character is gifted with fire-manipulation, and then maybe any kind of cold will have them unconscious (for how long depends on how cold it is, and how long they're exposed to it).

Whatever plot you throw your character in should put them in a situation where they have to use their gift alot, and get to the point where they must decide whether its worth having their gift if all they end up doing is losing a part of themselves.

AAP by jemcat