Rainbow Rocks. Incredible music, and it was so incredible and satisfying to see Sunset redeem herself in the best way possible. She became my favorite character in the whole franchise which sort of made me disappointed with FG when she was pushed aside for Human Twilight.
While the Dazzlings are extremely cliche archetypes that kind of need to die it didn't really bother me and I still liked them and their designs, and I also like how they had Trixie play like a secondary antagonist role.
The interactions between Twilight and Sunset were definitely a highlight for me, they were both struggling with how people viewed them and were trying to not let everyone down.
I still regret not seeing it in theaters.