steins gate
it comes with a lot ending lol but it is the best unexpected ending in my opinion

subscribed

slam dunk ，regretful youth makes people remember

Code Geass was definietly great!
I really liked Gungrave as well.

Nothing beats the first kaichou wa maid sama ending!

No doubt, Code Geass is the most plot twist ending that I ever watch.

Not many anime present good story even if its manga in my opinion is superb,let alone having"good ending".
I already used to some anime hang not having any ending at all, skipping many story arcs jumping to death of mc/villain, or just won't let go its popularity then just continuing its story even if doesn't make any sense(like naruto-boruto).
So sorry if my standard is so low.

This is my 'good ending'
- Code Geass
- Assassination Classroom
- Fullmetal Alchemist Brotherhood

Parasyte ending was good

anohana

Breaking Bad, cried.