Settling on a favourite is to hard, but this interaction inside a Council mission made me laugh out loud today:
[NPC] Tom: You might be able to make it up with some field credit, Matthew!
[NPC] Matthew: Don't be so upset, Tom. I qualified to become a vampyr. You didn't. That's all.
[NPC] Tom: One defeated hero and I will be in for certain!
[NPC] Matthew: I know you altered my test scores, Tom. I should get to become a mighty vampyr!