This could be a really old thread, but I'll give it a shot.
I've been called a pantheist more than once. My title says that I'm an atheist, which is true in regard to supernatural deities I suppose, but my view on deity is extremely hard to define. I don't think I've ever come across a definition encompassing my views on the matter. I am an atheist that very much feels the presence of God, and I do have personalized devotions and prayers as well as spirit guides, even though I acknowledge that it is quite possible (even probable) that these beings and deities/Deity do not objectively exist.
If these experiences are indeed merely subjective products of my brain, they must also be an extension of the entire universe -- the laws of physics, my genes, environment, evolutionary background, and so forth. Thus, in a sense, the universe is deity for me. (You might see why it is easier for me to merely tell people that I'm an atheist.) This may be some type of blend of pantheism and panentheism.
So, for someone in my shoes or in a similar boat, for whom neither the terms "theist" or "atheist" are quite accurate, pantheism could be a fitting term, and I've flirted with it myself. I did have one major objection to pantheism that seems to have been resolved for me. That objection was that nature can be quite cruel and ugly: hurricanes, plagues, tapeworms...you get the picture. Why reverence this? How is this divine or awe-inspiring?
The answer occurred to me quite unexpectedly, like poetry, I suppose. Even the horrors of life give me a sense of how fragile and fleeting life really is, and how precious is every sweet joy in life, so precious that suffering seems to dim in comparison. I believe this is what Buddhists call
Tathata. Suffering is that. Beauty is that. Though these terms are subjective, they are interconnected within me and could not exist even as subjective states without the interconnection of all that is.
So even the ugly things in life can inspire awe and wonder and even a type of joy. I know "God" is not the best word for the universe, but neither, in my opinion, is the word "universe." Mere words cannot convey the depths of reality. "God" is merely a familiar term that reminds me of that which I cherish with awe and wonder and a reverence similar to, but not quite the same as, fear. After I began to see things this way, pantheism began to make sense.
But labels are very inadequate.