That question is too hard to handle, honestly. It depends on the game in question. Depending on the game the kind of ending I want changes. Take... say, Tales of Symphonia and NieR, they're vastly different kinds of stories and I wouldn't want the same kind of ending for the two of them.
The only exception is basically ambiguous, that... pretty much never goes well, IMO. To Be Continued is similar, if only because half the time I feel like it won't be continued.
Disgaea makes you Earn Your Bad Endings.
For good reason too.
Disgaea 2's Worst Ending is still one of the more disturbing endings I've experienced. Didn't really see that coming!
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xp1337: Don't you wish there was a spell-checker that told you when you a word out?
GotD (219/384) Melee v FFX