Well... personally I believe the evidence which suggests that they're instinctive animals and have a *bit* of an issue with the idea that a snake thinks or feels in the context that WE use the word... Stimulus prompts response, response is instinctual and genetic...
Sums it all up in one little sentence as far as I'm concerned. They are not dogs. Nor are they people. I don't think we chould put characteristics that WE have on to our pet reptiles. The mechanisms simply aren't there.