I watched Jaws (1975), my first time! It was so good.

Two things stood out to me. One, I wasn't expecting the movie to have such different first and second acts. It worked, but it surprised me. And two, Richard Dreyfuss' character is incredibly well acted and fun. I don't know, I was expecting the movie to feel "old". Not only did it not, but his character in particular stood out as so well done and so fun to watch.