I must have seen them all. When living in California we went to Universal Studios and that bastard scared the crap out of me.
I saw it in the theater with my sister (older) when it was re-released in 1980, I was nine. I seem to recall it was a double feature, showing Jaws and Jaws 2 (both re-released), like they used to do with the Star Wars films. Those were the days, eh?
Scared the hell out of me. I had nightmares about sharks. We had a pool built during the same summer, and when I was swimming in the pool by myself, I would think about those scenes of a shark stalking a swimmer from behind, my imagination would start to take over, and I would actually scare myself into believing a shark could be behind me. I would swim as fast as I could to the side of the pool and scurry out, then laugh at myself about it.
In fact, I still have an infrequent nightmare about being in the open water, like after your boat sinks or something, and a shark stalking me. 34 years later!