Star Trek is a difficult one. The oldest stuff is very dated, even TNG has some things that are very weird for a modern audience. But, some of the modern stuff is basically unwatchable.
Yeah, there are some amazing episodes. TOS also has some amazing episodes. Offhand, I can't think of anything since DS9 / Voyager that was that good. There were definitely some fun episodes, but nothing that I kept thinking about for a long time after they aired, like say Picard's living an entire life in The Inner Light.