The villain wants to ruin the world, and his motives are always overly complicated
What is it: So, we hear you’re a villain who wants to destroy/rule the same world that disappointed you. Here's what you do: construct a crazy, complicated plan to destroy the world by controlling the empire, ruining some towns, forcing a cult to worship you, destroying a crystal, burning down a forest, and doing other stuff that makes for an epic adventure. But you can’t do it all by yourself - after hatching the master plan, the next step is to develop a network other bad guys to do your bidding while you sit back and watch it all unfold. Hire your best henchman to obstruct the heroes’ journey every step of the way. He’ll be the Darth Vader to your Emperor Palpatine. Sure, you can do it yourself, but menial labor is so beneath you.
Why we love it: With a plan so elaborate, it’s practically fail safe right? Wrong. It’s convolved, ridiculous, and hilarious. Do they really think this will work? It’s not like the villains never succeed, and it’s cute to watch them try. Plus you would think they would have a backup plan in case if some brave souls try to foil their plan but no. They are really confident that they will succeed.