Definitely Nan's stuff (at least all those that don't include kids).
More than most fic writer's Nan lays a solid A-plot foundation to her stories so that means they have more of the feel of watching an actual episode. That's not to say that she doesn't include the B-plot relationship stuff, because she does. Her stuff is great.
Of course, there are lots and lots of great stories out there that have the feel of an episode, so if you're looking for more to read. Start with the writers you like, then branch off from there.
Tank (who when he first discovered the archives, began by reading through all of the descriptive blurbs and jotted down those that seemed most interesting)
