What's the best comic book issue or series you ever read?

And why was it the best ?

Uncanny X-Men #129–138 The Dark Phoenix Saga
The first time a hero went villain that I ever read about.
Had all my favorite X-Men and Imperial Guard characters.
Good writing, great artwork, definitive story arc.
An iconic story that changed the landscape of comics.

Bump

You're not going to get many responses because there's a whole forum for discussing comics on this board.

https://www.killermovies.com/forums/f98/

Thought mostly everyone on liked some comic books but ok. Thanks for the advice