S TIER
#1 Turkey Day- This event was aesthetically great. Set again the autumn backdrop with great music to accompany it, just seeing everyone in the plaza already brought this event up to at least a C. Then when Franklin had me go find ingredients, this actually provided some aspects of discovery that I had been yearning for. I learned on my own about the secret ingredients as well as the fact you could get ingredients from villager who were cooking in their houses. This event also had just enough challenge. Finally, the cherry on top, the furniture! It exceeded my expectations. Overall this was the perfect event to me. (Although if I had to complain about one thing it's that I wish they kept the name Harvest Festival from past games instead of making it Turkey Day)
A TIER
#2 Halloween- I consider the lead up to this event as a part of the event. It was so nice to be able to decorate leading up to the event and the introduction of pumpkins was huge and added something awesome to our islands. The new items were so great! The atmosphere on the actual day of the event was perfect and such a fun celebration. It was always hilarious to get "tricked" and see what would be drawn on your face. My only complaint about this event was that on the day of, it wasn't long enough.
#3 Birthday Celebration- This little event was even sweeter than I could have imagined. From the party, to the gifts, to KK playing a song for you with notes from villagers, how could you not tear up??? This little event exceeded my expectations.
#4 Festivale- Confetti flying through the air and everyone dressed up to PAR-TAY means a great, fun atmosphere right off the bat. Then you have King Pave who is great and amazing new furniture. I agree with many people, I do think it's silly that we didn't get DIYs for the furniture, but the "grinding" to get the different colors was actually kind of fun for me. You could also trade feathers with your villagers, which made for some fun interactions. The feather stacking issues didn't bother me at all. Other than adding DIYs, my other recommendation would be to let furniture be customized into a certain color with the same color feathers instead of rainbow feathers being the only customization ingredient.
#5 Bunny Day- Like Halloween, I thought the lead up to this event was great. I especially thought it was special being at the same time as cherry blossom season, although I understand other player's frustrations. I actually liked the strange Bunny Day furniture and I think Zipper is quite funny. My only complaint is when fishing for fish and just getting eggs. I honestly think this event would be higher in the "A tier", but other people's perceptions of it have influenced mine unfortunately.
B Tier
#6 New Years Eve/Day- This event might be a tier lower had it not been for the great music that played throughout and into New Years Day. It was very much like a winter version of the Fireworks Show...but with less to do. Again, I don't mind not having a ton to do, because it was made up for by the great atmosphere with the villager being all excited and the giant countdown clock and then the big climax at midnight. I just wish there was something more...maybe on New Years Day helping the villagers decide on resolutions or something?
#7 May Day- Such an outlier in terms of any other event. It was a puzzle, unlike anything we had seen before, and it was so fun! A little short, but fun. It was also great to see Rover and the suitcase was very cute. I just wish there was more to it such as the puzzle changing every day since this event lasted a week(?).
#8 Fireworks Show- A great atmosphere and it was cool to see Redd hanging out on your island again since the first time you met him. The little toys you get are awesome. Not a ton to do, but definitely more fun when you have friends around. Although I did landscape a bit during the show and that was pretty relaxing and fun.
#9 Bug Offs- Definitely an improvement from the Bug Offs of past games. I find the items you win to be better as well, but I just hope in the future they will update the prizes to change, otherwise Bug Offs are pretty irrelevant after the first year.
C Tier
#10 Toy Day- This one hurts to put below a B...but I was just a bit letdown. Toy Day was my favorite holiday in past games, but in NH it just seemed so insignificant. There was nothing leading up to it except Nook's Cranny selling toys, and I feel like I spent absolutely no time with Jingle. Yeah, there was the gift exchange, but it's not like that gave you some cool new furniture, it was just recolors of the toys. What Jingle does give you I loved, I just wish there was more to this whole holiday.
#11 Wedding Season- Great idea, but kind of annoyingly repetitive. By the end of this I was just throwing furniture anywhere in the room to get the max amount of heart crystals. That being said, seeing Reese and Cyrus for the first time with the Re-Tail theme playing in the background sent a wave of nostalgia through me. It was so good to see them. Also, the furniture was great and I loved the customization options! Again, it was just too tedious for my liking and also I wish you could've interacted with Reese and Cyrus more.
#12 Fishing Tourneys- I never really did these in past games, but I definitely don't love doing them in NH. Having to stock up on fish bait is a major drag. I almost wish C.J. didn't allow fish bait to be used and then the points were adjusted to accommodate that. Having to just throw bait, cast, catch, repeat is boring and feels robotic. I love the prizes you win though, I just hope they change over time.
D Tier
#13 Museum Day- Not sure what the point of making this so long was. I get the stamp locations changed every day, but then why not make the prizes different? I did this event maybe twice and then that's it. I love the decision to have an event that makes you go into the museum, I just wish there was more to it.
#14 Nature Day- Can you really call this an event? All it did was add nature-y Nook Miles+ goals. By the way, this on no way reflects Lief because he is great. This event was just lackluster and barely an event.
I loved the furniture set, it came with DIYs (no special event crafting items were necessary to craft them which was great), and I think the event itself was very cute! I liked how community based it was and that it really involved the help of your villagers which I liked a lot. And you had to do different things like fish and harvest pumpkins which made the event have more variety in the activities. Also Franklin is a cutie-pie and kind of a dark joke with him being a turkey which I like. 
