I've watched this more times than I can remember, but I never get tired of it 
On Any Sunday Bruce Brown Steve McQueen
That's exactly my favourite part of the movie, that slow-mo scenes and thet 70's music....
I watched for the first time just three or four years ago. Have seen it at least once a year since then.
Ended up buying a DVDset at Amazon with the sequel. Forget about it, the first one is the one to see. Maybe the interviews with Bruce Brown and Malcom Smith are interesting.
I had never heard about Malcom Smith before I watches the movie. In the DVD set he is -obviously- 40 years older and that struck me, because I haven't seen McQueen get old for obvious reasons. I mean, haven't seen anybody in the movie getting old, and seeing Malcom Smith was like if he had grown 40 years in the blink of an eye! Actually, he relates the anecdote of a young boy that, after watching the movie, approached him and told him something in the line of: you must be Malcom Smith' grandfather; is he around here?
I like the movie so much that I watched "the endless summer" too. I didn't like it that much, maybe just because I'm not into surfing.