DAO: The battle at Ostagar
I know it's overplayed, but I still love "swooping is bad"
Alistair giving my Warden the rose
Riordan sacrificing himself at the Battle of Denerim
Farewells to the crew before the final battle
Fighting alongside all my gathered allies in the final battle
DA2: Meeting Flemeth while fleeing Lothering
Conversations with Bethany/Carver in Act 1
The conversation with Bethany/Carver in Legacy
All That Remains, especially following Leandra's trail of blood
Varric commemorating the anniversary of your meeting
Varric saying, "Oooh the 'anged Man iz so filthy", laughing, and then Fenris saying, "It is." LOL.
Every scene in Fenris' romance
Fighting alongside Nathaniel, Zevran and all companions not in my party in the final battle
DAI: Leliana sacrificing herself in the dark future (probably my favorite scene series-wide)
The Elder One's reveal at Haven
Singing "The Dawn will Come" with my people, journeying to Skyhold (so epic)
Seeing Hawke again
Seeing Hawke and Varric together again
Every moment from confronting Clarel to falling into the Fade in Here Lies the Abyss (holy @#$%)
Varric reminiscing about Hawke or Alistair after Here Lies the Abyss (some serious tears here)
Cullen giving me the coin for luck
Consummating my relationship with Cullen (awwww yeah)
Flemeth's reveal, followed by Morrigan's reveal as a loving mother (some answers and great character development here)
The end. After the credits. You know what I mean.
I keep adding stuff because I keep going, "oh, and!" Lots of moments I've loved.