Is Cade like eating the souls being sent to him or just torturing them for all eternity? Cause if it's about eating maybe the ones who make terrible choices in an impulse, but overall are good people have better, more filling, souls to feed on
.
If it's about torture I think it's in relation to what happened to him as a human. There were good and innocent people and kids who suddenly turned on him and tortured him into death. I think he finds more satisfaction in leading good people into bad choices because it's similar to what happened to him and he thinks all people are capable of evil and terrible deeds if pushed just enough.