The reveal that the Crippled God was the Narrator All Along, and that the suffering of everyone in the series wasn't for nothing because even if a character died pointlessly their deeds were still recognised.
A friendship of Karsa and Torvald Nom in House of Chains, and this line:
“We have saved each other’s lives, Torvald Nom, and so I am pleased to call you friend, and to think of you as a warrior. Not a Teblor warrior, of course, but a warrior even so.”
Shadowthrone and Cotillion finally showing a little humanity at the end of The Crippled God and reuniting Crokus and Apsalar. Hell, most of the epilogue counts.