Quasi pantheist here.
Yet I've never been sure whether this means I believe in God or not!
I like Wikipedia's definition- "Pantheism is the belief that the Universe (or nature as the totality of everything) is identical with divinity, or that everything composes an all-encompassing, immanent [let's come back to this word in a moment] god. Pantheists thus do not believe in a distinct personal or anthropomorphic god."
This is sort of my Allah/God. It makes me sad that many people who are Muslims and any other from Abrahamic traditions, don't see that the concept of Allah in Islam is amazingly pantheistic. Allah/God is not "person" and anthropomorphism is forbidden. Of course, people are doing the opposite. And that's the main principle of Islam - in all possible factions (sunni, shi'a and sufi).
But the moral of this is... sometimes we should dig deeper in "known" concepts. We can be surprised when we find something so close to our personal believes. It can be pretty strong if we consider particular religion/faith as total opposite.