If I say I watched a movie for the first time, it means that it was the first time I saw that movie. I could watch that movie more times, but that was the first time I watched it. If I say the first movie I watched, then I have to remember back to my childhood to the first time my parents took me to the movies, and it gets fuzzy, because I was young and don't remember well. If I only want to talk about my first experience of Stallone movies, I say "the first movie of his that I watched." Or "the first of his movies, that I saw." (You can use saw instead of watched. They mean the same.) Have you seen demolition man? It is one of my favourite Stallone movies. Also did you know that part of his face is paralyzed? But he still acts. He never let it stop him. One of my favourites is Hugo Weaving. He was best known as the bad guy in the Matrix movies. He made the movie V for Vendetta wearing a mask the entire time, but he still played a great character, even without the use of his face.