This is a difficult prompt. Unless you have someone you watch with who has very different tastes, you just aren't going to watch genres you don't like.

So I picked film noir, a genre in which I can often tolerate a movie but rarely think twice after I've seen it. The movie I like, often said to be the first film noir is The Maltese Falcon

https://www.youtube.com/watch?v=3a9YU1SVbSE