Hi Ryan.
Really seems like you had a nice time.

I also had great night dive experience - it was last fall on Maui, Molokini with my buddy Josh/demasoni.
Well, you dove at aroud 15ft depth, it's ok, but I would be very afraid of diving deeper in pitch black - once you get negative buoyancy how would you know which way is up?
We dove with other divers (scuba) and water around was lightly illuminated from the boat, and plus that we dove around moorings and had our own lapms - just for case.
Anyway - you are right that night dive is really special. I liked it too.

I just wish I wasn't so scared and worried because of sharks. We were told that they are frequent around after sunset and that made us a BIT nervous.
Enjoy your dives.
Petr