Prompt: a plotline you refuse to read/watch, & why
I think I'm fairly open to most things, but I actually do have an answer to this: Any plot which centers around two people who fall brilliantly in love before discovering that one of them is sick/dying and their love is doomed to a tragic end. So anything by Nicholas Sparks, basically. It's not that I think there's anything wrong with it, mind you; it's just that I have no desire to do that to myself emotionally. At all. Ever.
What about you? What are your no-go plotlines?