My kids are heavy sleepers too so it's not much of a problem for me to get sleeping pics. My favorites are when they fall asleep on the floor, or face first into the couch, or in my daughters case... standing up on the floor with her body laying over the arm of the couch. Those are my favorite pics of them sleeping. The light is usually good and it makes for a good story later. If I get to snap pics in bed, I turn on a lamp and use flash if needed. I like that "bright" picture as well as one that looks like it's dark. It makes for a great contrast.