I don't recall any games in recent memory that I really cared about the ending(s) as of late. I played GTA IV all the way through and thought both of the endings there sucked(mainly because I didn't really get too close to many characters in the game).

I played Red Faction: Guerrilla and I thought the ending for that kind of sucked too.

I'm playing Red Dead Redemption right now and while I like the open expansive game world I don't like how the game started, so chances are I'm going to hate the ending of it as well.