-Kingdom Hearts and Kingdom Hearts 358/2 Days: The other games all had excellent endings as well, but these two in particular really knocked me out. Wish I could play them again right now...! ToT
-The World Ends with You: Still one of my all-time favorites, please play it if you haven't already!
-Tales of Symphonia: It was an awesome ride all the way through, but I loved the way they wrapped it up. Very nice tie-in to the rest of the series, too.
Chrono Trigger (DS): Yet another awesome game, with several great endings. I'm sorry to say I've yet to see the additional ending they added for the DS version, but I do intend to unlock it at some point. Regardless, the game's main ending is a great one, albeit a little bittersweet.
Hmm