For 1 and 2 I would say that's correct for 99.9999% of snakes.
That said, I have a 50% SD female retic that doesn't "cuddle" like a dog or cat but she is a lot more willing to interact with people than my other snakes. If she's not in a shed cycle or within a day or so of eating she will come right out of her enclosure, crawl on you, explore your hair, etc.