So far I watched countless episodes and series. Never watched something more than once. Except Rick and Morty... Starting my third rewatch right now :D, it is that good! But I can imagine it is not for everyone ;).

Dr. Who crossed with Ren and Stimpy. This is the best and my overall favorite show now. I love how they parody the greatest shows of all time, like when they redone a Stargate SG-1 episode. I agree with @novulon I can rewatch these episodes multiple times, and still get Swifty.

If you're not sure, give it some time. By 3 episodes in, I was HOOKED! It's super intelligent, lots that you can miss if you're not paying attention. It riffs on other great shows - the references are killer. The ecosystem they build is recursive; something will feel like a throwaway comment and it will come back much later. Great show for those that love no limits, off the wall, intelligent comedy.

fantastic show till season 4

I will NEVER look at Pickles the same way again......EVER! (I see ya GROOVIN' though) https://www.youtube.com/watch?v=Qx26lXdLUCE