I like any ending as long as it isn't half assed. A story that doesn't go all the way with the ending it wants to tell just isn't fun for anyone.

No ending
aka
Hiatus

I need some kind of closure when I read a story.  As long as I have the feeling "yeah, that makes sense" when I read the last few pages, I'm satisfied.

Stories that don't really end so much as 'meander to a stop' or 'lay the out the stops on the next adventure' VEX me.

That's also one of the reasons why I think I enjoy the MCU, anime and BBC shows so much.  They often draw from other already established/ongoing sources (i.e. comics, manga, novel series, etc.) and can take literal years to produce between instalments.  So those other mediums have the luxury of condensing the narrative into stand-alone arcs within a much larger saga with their own beginnings, middles, and ends.

Nothing can make me more aggrivated when finishing a story than to read that a few seconds after defeating the Big Bad, some completely new and completely unforeshadowed character appears out of nowhere saying that "The real battle has only begun".

When you look at the first Iron Man movie, Tony Stark saying "I am Iron Man" is a proper ending.  In the post-credits scene, Nick Fury doesn't come out of nowhere.  He's Coulson's boss. 

Yeah, that makes sense.

Happy endings, no question.  Gimme that old wedding and a baby, everyone lives happily ever after, candy!

Tragedy or bittersweet are my two favorites, though occasionally a wholesome ‘good ending’ is good for the soul. Nothing wrong with things being happy and turning out ok sometimes. 

It depends on if we're reading or writing.

If we're writing, then we want somewhere between bittersweet and happy.

If we're reading, then we love tragedy.