The project I'm working on has a sad ending. I had the ending and the first scene from the very start and I've been fitting the pieces in between ever since. Now as I look back on it, I'm wondering if a sad ending is going to disappoint the reader. Imagine if Harry Potter had died after killing Voldemort (my story is not quite so awful, but close). They say everyone wants a happy ending, but somehow it just seems too predicable in my case. Which do you prefer to write: sad endings or happy endings? Which do you prefer to read?