I love the Moonlight Sonata.
As you probably know, Beethoven never called it the Moonlight sonata. The name was first coined by music critic, Ludwig Rellstab who compared it to moonlight over lake Lucerne. Beethoven himself was very bored with the popularity of the first movement and apparently remarked "Surely, I've written better things."
I do agree with you though. The whole sonata encapsulates all the emotions of someone coming to terms with loss. Whatever interpretation we put upon it, it is as always, the work of a supreme being.