I've rewatched the entire series at least 6 times, and a handful of episodes well over 10 times each. The Nora episodes from s1 and s2 probably like 20 times each. I personally rate the rewatchability very high, I'm also just madly in love with the show (obvs).
Lindelof's new watchmen series starts Sunday on hbo. Another leftovers writer wrote maniac on netflix which has a similar emotional tone and is excellent as well.