xhonzi said:

See also Star Trek 2,3,4. After letting someone other than Nicholas Meyer make 3, they learned their lesson and let him return for #4. (Then they forgot it for #5 and remembered again for #6)

The directors of the first six Star Trek films were, in order: Robert Wise (TMP), Nicholas Meyer (TWOK), Leonard Nimoy (TSFS and TVH), William Shatner (TFF), and Meyer again (TUC). (Meyer did have a hand in the TVH screenplay, though.)

The Nightmare on Elm Street films (in reply to another message) did pretty much devolve into camp right around the third film, turning Freddy from a truly scary villain into a wisecracking practical joker (that just happened to kill people). The only other film in the series (besides the first) that was worth anything was, in my opinion, New Nightmare.