I don't think snakes day dream, however i am of the belief that they do have incredibly diverse personalities. Nagini can sit on my chest and never move. I can handle him in shed no problem, has never so much as hissed at me even if I surprise him. My friend has a BP that he handles in the exact same manner, and as often as I do Nagini. But this snake is a pissy biyotch. If she doesn't want to be handled, she lets you know it. Loudly.