Do you think your snakes can be affectionate?

[RachelS.]

Today I took out my black blood python and layed him on the ground next to me. Next thing I knew, he was cuddling up to me so I hugged him and pet down his back for a while. He really seemed to enjoy it. He actually went up to me and sat in my lap! It was so cute! Maybe it was because of my body heat? Or do you think snakes can actually understand how to "love" someone in a snake-like way?
I would also like to share an experience last year. My friend was holding my female boa constrictor as we were watching TV, and the snake seemed a bit restless after a while. She slithered over and got all snuggly in my lap then curled up. She just layed there for about 45 minutes before I decided to put her back in her enclosure. It was weird, though. I never knew snakes would actually "go" to their owners like a dog or cat and want to be warm and loving.
I have also heard of burmese pythons getting excited when they see their keepers. It's a very cute thing, actually.
But anyway, do you believe snakes can show the affection they have? Do you think they have this sense of personality? I believe they do after witnessing my experiences. It's an incredible herp world out there...