Personally I favored the endings of anime such as: Saber Marionette J to X, Elfen Lied, Mahoromatic, GunBuster and Gungrave.
Its just so dramatic how there was a great sacrifice made in each of those endings.
Dont really wanna "spoil" things so...V
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Pretty much all of those titles except Gungrave, the character(s) that was thought to be lost/dead all came back. Or atleast they made you think that. Especially in GunBuster, when they return to the Earth that they saved after THOUSANDS of years...sacrificing everything that they had. Yet they were not forgotten and they were welcomed back. (T^T) I also liked Gungrave's ending. I've played the game and the anime's ending is much sadder and dramatic. Both the endings work for me though. ^^;