I've just had the loveliest bonding moment with my mollies. They were eating from my hand, as they normally do, but then they went INSIDE my hand, on my palm. I could close my fingers and they wouldn't panick, just gently exploring.
No matter how pretty and intelligent other fish can be, I think mollies will continue to be my favorite fish because they are sooooo trusting. Here's some pics.
It's a really lovely feeling (the fact that they trust me so much) but extremely unhandy as they are always in my way when I do tank maintenance. I sometimes wish they had a more developed sense of danger!