I'm not a fan of this film. I actually think Targets is Bogdanovich's most interesting film. I like Nickelodeon as a reflection on the problem of achievement in the New Hollywood era--how do you make a good film when everything's already been done? Bogdanovich takes that problem out of New Hollywood and pushes it back to the 1910s with Griffith and Birth of a Nation. It also has a nice moment where it puts Jimmy Stewart's words about filmgoing into the mouth of a fly-by-night producer.
I like Saint Jack, and I'd like the chance to watch it more carefully. If memory serves, it was filmed in Singapore with financing from Playboy--nice performance from Ben Gazzara too.
That being said, I prefer Hooper to all these Bogdanovich films. It satirizes him as a pretentious fop.