Everything you said here, I accept. Even the notion of Mother Nature giving us gifts, or leaving us hanging, or busying us with mysteries, but I don't believe Mother Nature has to be personal to do these things, I still don't accept Pantheism, and I don't think there is anything supernatural about existence. I'm just a bog-standard Atheist realist.
Of course, I don't think there is anything supernatural at all. There exists nature and nothing else.