I'd never even watched a single episode by the time it was over. I've seen a couple since...meh.
I was a fan of Cheers, but I thought the spinoff Frasier had some of the wittiest writing I'd ever seen on TV. As for the rest of the list I'll go along with Buffy and The Simpsons.
I tihnk my list would include in no particular order: Hogans Heroes, Beverly Hillbillies, Gunsmoke, Bonanza, Seinfeld, Frazier, The Outer Limits, Perry Mason, I Love Lucy, Married with Children. That is 10. I am sure if I tried to rank them and spent some time with this I would bump a few out and add a few.
I never watched Gunsmoke much and maybe I would bump Gunsmoke or Bonaza for Little House or the Waltons none of which I watched. But if your list is going to be more than just you personal favorites, you have to think about it and not just what you watched.