I love the Weissmuller Tarzan movies, but after Tarzan and His Mate
they definitely become way too family friendly. The first two films are both exotic and erotic and Jane is a strong woman with blood in her veins-- in the later films she is demoted to jungle housewife.
As for the "genre" issue, I'm happy to have stuff like Tarzan included under that umbrella. Genre is a vague term, unlike Mystery or Science Fiction; really, any work of fiction has a genre. But in the context we use it here, it really means almost-anything-but-mainstream, which pretty much suits my tastes.