Black Mirror ranking (so far):
1. Be Right Back (Season 2)
2. White Bear (Season 2)
2. White Christmas (Season 2)
2. Playtest (Season 3)
3. The National Anthem (Season 1)
4. The Entire History of You (Season 1)
5. Fifteen Million Merits (Season 1)
6. Nosedive (Season 3)
7.The Waldo Moment (Season 2)
8. Shut Up and Dance (Season 3)
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Note: I haven't finished the series (and am going in "order") so this is just preliminary for me so far.
I really like Be Right Back because I love shows/books that explore death and remembrance (Dead Like Me is a favorite of mine) and how people grieve.
White Bear and White Christmas are tied (with Playtest joining them) because White Bear's entire twist I didn't see coming. It throws you into the deep end and you're like "what the fuck, what is wrong with these people?" and then it does "oh the mobile towers, if they break that, maybe things will happen!" (as in a case of life imitating art: 5G FAST DOE) and then you find out this main character is really a bad person that you shouldn't be cheering for.
Same with White Christmas. I REALLY enjoyed that one even though it isn't Christmas time right now. I wasn't expecting Jon Hamm at all, so it was really a surprise to see him on the "show"/special (which was before Netflix and possibly cancelled?) and he played his part really brilliantly to where the twist I knew was possibly going to happen eventually but I wasn't expecting it in the way they did it.
(I don't necessarily want to open spoiler in case folks around here are going to catch up on it like me)