Are there any film franchises where you just wish they'd have left the original alone?
-No, don't have to watch the sequels. Like I remember one great Jurrasic Park, and don't care for it's sequels. Some people must enjoy them(I think).
Are there any films you'd like to see a sequel to?
-Titanic(joke)
-Can't think of any really, I think either films are self-contained and have their happy ending or any potential for sequels of a successful movie is already done for the possibility of extra revenue.
Actually I do have one, War of the WorlRAB. Not sure it'll retain it's original charm, actually it probably wouldn't, but this is some years on and Martians attacking again but they've developed immunity this time to the bacteria.
"How many sequels are enough?"
DepenRAB how much room for creativity there is in something I think. Like Carry On films theres a fair bit as it revolves more around the characters than anything else, James Bond you got all the creativity of the books already there. Some films are sort of limited, in fact, something like Jaws is surprising that it has sequels.