Which James Cameron movie do you think is his masterpiece? (Discussion Thread)

James Cameron has made some incredible films over the years.

From Avatar to Titanic, Terminator 2, Aliens, and even his deep-sea documentaries.

If you had to choose one film as his true masterpiece, which one would it be and why?

Feel free to share your thoughts, favorite moments, or even rank his movies if you want.

Curious to see what everyone thinks.