...I saw KB's film, and agree, as she writes in an earlier post (which I've linked), that:

...the language in the hands of a great actor is wonderful. And once you've seen it performed, reading it becomes a totally different experience.

] Certainly, Horatio is primarily a plot catalyst and observer, but the Branaugh version (and NF) gives him something more, IMO: a life.

I also liked NF's portrayal very much indeed, and I noticed him so much more when I read the play again afterwards.

I like to think he doesn't kill himself at any point. I interpret Hamlet's "awhile" to mean until Horatio's natural death, so that the story can be told firsthand for as long as possible: