I don't mind if it was foreshadowed well enough and something I had previously forgot about swoops in to save the day (Toy Story 3)
If the movie has been an emotional rollercoaster the whole way through then I like to keep guessing at how it will end. It just adds to the tension when I want all the characters I've grown to like to make it through okay. There are a few times when I feel the story would have had a deeper impact if a fake death stayed dead but there arent too many where Im too disapointed with the outcome.

What I really dont like though is when they have a litteral big party at the end to show how happy everyone is (Unless the party is already happening during the climax and relevant to the plot)