There is an Umineko thread regarding this, so here is another, Higurashi one. Higurashi is my favourite 07th Expansion work thus far, so there are quite a few scenes that I like, mostly Meakashi and Minagoroshi ones, as they’re my two favourite arcs. Anyway, here are some that I like, I may or may not add more later:
Shion escaping from St. Lucia and moving to Okinomiya and meeting Satoshi
Shion and Mion’s switch, so that Shion can go to Mion’s school and get to know Satoshi better, so the whole school scenes regarding that
Shion becoming interested more in Hinamizawa’s history and reading Takano’s notebooks
The background of Shion meeting Keiichi, in which she has mixed feelings about him and thinks of Satoshi
The whole Mion and Shion switch in Meakashi, with Shion starting to learn more about the village and going to the village meetings and everything
All the scenes in the torture chamber with Shion and all her victims, except the parts where they’re killed, of course
Rika hanging out with Akasaka in Himatsubushi, and later predicting the ominous deaths that will take place
All of the scenes of Rena in Tsumihoroboshi, her being alone in the old bus at the dump, and her paranoia and suspicions starting to get the better of her, and all her theories she comes up with
The reveal of Rika’s true nature in Minagoroshi
Rika explaining the details of Hinamizawa Syndrome to her friends
The revelations made about The Irie Clinic and Takano
The whole struggle in Minagoroshi, in which Takano chases after Rika and her friends, killing them one by one and even so, Rika doesn’t give up hope
In Matsuribayashi, all the meticulous planning that goes in Rika and her friends’ plan
The carrying out of the plan and all the obstacles and overcoming of them that come with it
Shion learning the truth about Satoshi from Irie
Takano and Hanyuu’s discourse near the end of Matsuribayashi
Rika’s scenes talking with Hanyuu about the new world she has found herself in, in Saikoroshi