90s Simpsons were the best.
Star Trek: The Next Generation
I love TNG, but for whatever reason I prefer DS9. I still remember watching the first episode and thinking that being a Star Trek show set on a space station was a bad idea. I think maybe being proven so wrong about that plays some role in it.
I could never get into DS9 because I am a huge Babylon 5 fan. What Paramount did with DS9 was low.
X-Files was a blast live… Not sure if it holds up to reality these days
At the time, it was probably Ren & Stimpy or Space Ghost Coast to Coast. Both were unapologetically weird.
In retrospect, probably Reno 911! Not only was it loaded with funny scenarios and running gags and tons of guest comics, but the physical comedy was really good. They were always tackling somebody or running over Junior with a Hummer or somesuch, and it was usually the main actors doing the stunts.
Honorable mention to Strangers with Candy. It took the Seinfeld formula of a sitcom full of disagreeable people and amped the contempt to 11.
Farscape