There is pretty much no debate about whether or not Jaws, directed in 1975 by Steven Spielberg, is a great movie. It's clearly masterful, and obviously well-shot, directed, written, and acted. It's an incredible movie, and so much talent and skill and love went into making it.
The only question I have is how much I enjoy watching it over and over again. I really enjoyed the movie when I first saw it as a kid, but it does seem to lose some it's excitement, for me, each time I see it. It's sort of like, once I know what is going to happen, it gets a little more dull to watch each time. I did watch it feeling tired and full of food today, but I just wasn't as engrossed in the tension or scares this time. Maybe it's just me. Keep in mind, I'm not saying that I don't like the movie, or I don't think it's great. It's great. I just wasn't feeling it today, but that doesn't mean it is not great.