To Prologue, or Not to Prologue?

I don't actually have any book worried about having a prologue or not, but I've noticed among reviews and critiques of things that many people dislike prologues. Some rather intensely. While others are fans of them, or are writers who prefer to use them. I myself have nothing against prologues, so long as it suits the story.

But, I pose the question to you, dear reader, why do you dislike (or like) prologues? I'm curious to know if anyone has an opinion on this they would like to share!