I think that one reason why Hades eventually warmed up to Hermes is that, even if Hermes surely sees Hades as quite an eccentric, he has never made fun of him. And unlike most of the other gods, Hermes doesn’t see the dead as frightening/uninteresting, or that it is somehow below him to have connections to the Underworld.
Your Hermes is mostly nice, too. He was PLAYING with the confused little dead teen wife ghost, and he treated the potter's son he dallied with very decently. I'd rate him somewhere between chaotic good and chaotic neutral.
Yes, he's mostly a nice person. He can be mischievous and he doesn't always care about the law, but his heart is usually in the right place.
GASP!! A hades Hug!! I want one!!