Night dives have been some of my favorite and most memorable dives. My first one was at Hol Chan earlier this year and is still one of my favorite dives ever. I liked it so much I did the same dive twice more on the last trip down. I was with a friend all 3 times who is a snorkler, and she is now obsessed with night snorkeling too. At night your world is reduced to what you can see in your flashlight beam, so you really are living 100% in that moment and focusing on the things you are seeing.