I've been playing for over 40 years and I have 21 hole in ones over that time. I would have had 22, but it was so dark out nobody saw it go in. I really got pissed and told everyone to get their eyes checked, even the Putt-Putt attendent who turned out the lights just then.
Really, only 1 real one so far. In a C of C event on a 9 hole course, I got mine on #2, and recieved a sweater. If I had gotten it on hole 7, it would have been a riding lawn mower. Oh well.