Early seasons of TNG are the ones I go to when I want to watch Modern Trek. While the rest of the shows are watchable, I've got no real desire to revisit them at this point in time.
Exactly this. Nostalgia, camp value, and those "unique" Roddenberry touches in that first season see me choosing TNG.
From, say season 4 of TNG onward, everything in that show, and all the sequel series are just...so...unwatchably...stale...and...boring...z zzzzzz. It would have to be a very rainy day to get me watching things like Deep Space Nine and Voyager again.