I'm looking to get into a competitive format that isn't OU (either a different tier or OM).

Any recommendations? It seems like a lot of people here are fans of natdex because of all the blastoise shitposting, but It doesn't seem like my thing. I was thinking of giving 1v1 or Monotype a spin, or maybe one of the dumpster tiers. Are any of them more fun than OU for swshit (down to play usum too)?