I usually don't watch a movie till the very end. Once the story is finished, I exit the screen and skip the credits. However, this causes the movie to remain in my "continue watching" list, which bothers me. I have an OCD to clear movies from this list if I have finished watching the story. Ideally, I only want one or two movies in my "continue watching" list at any time.
If I start a movie, I will finish it at any cost and won't start another until I'm done, except rarely when I'm watching a long series.