Rating system: (this is based on enjoyment, but occasionally I inflate scores out of respect for ambition/execution/legacy)
I rate movies and shows separately since, hey, what chance does a standalone 2-hour film have if it's compared to an emotional connection to a ~26+ episode series?
10s are special. things can be raised to a 10, but the status can never be revoked. they typically had some sort of personal impact or appealed to me very strongly (the latter is often the case for movies/manga).
5 is the lowest I'll go for something I don't regret watching.
1-4 are varying levels of self-loathing for managing to watch to the end.
Gurren Lagann is actually an 11 and has little to no chance of ever being topped.
Anime "milestones" oh god someone help me why have I watched this much:
1st completed: Attack on Titan
200th completed: Jojo's Bizarre Adventure: Stardust Crusaders
250th completed: Haikyuu!!
300th completed: Hunter x Hunter (2011)
350th completed: Sarazanmai
400th completed: Lupin III: The Woman Named Mine Fujiko
450th completed: Dr. Stone
500th completed: Psycho-Pass
100days reached: One Piece Film: Z
550th completed: Ping Pong the Animation
600th completed: The Tatami Galaxy