Many more choices than the 3 you list for how people of the world now and historically have self-categorized.
Most of what you describe as Satanism correlates very strongly with Hinduism described to me specifically with regard to cycles of reincarnation and ultimate spiritual goal should you choose is to basically become whole with the ONE again or something like that. It does involve cleansing your Karmic bad acts over multitude of life cycles if you incurred a heavy debt in a past life before you can elavate into Nivana. I am sure I am misquoting many articles of faith there... but the essense is very similar to what you describe as Satanism.
The clear distinction is that no one that has ever described their Hinduism to me has done so with so much disdain for any other religion as you do toward Christianity using words like disgusts and what not. What kind of God would blah blah blah. If you believe in spirtual basis of being good and cycles of reincarnation, you being responsible for your ascention should you even choose and aspire to it, and that being your goal... why do you taint yourself with negative feelings? Why do you presume what a God would be like or not? Why do you feel you need to bring more people into the fold of how you perceive the world instead of just being in exploratory mode raising debates for mutual learning? Why do you talk about praying to Satan and getting something out of it as being a reason for signing up? Don't Christians also get something good out of their devotion as well? Didn't religion and people exist long before the Sumerians.
I agree 100% that Age doesn't restrict you from having the clearest thoughts or understanding, but based on what you say and the negative tone you carry, you delude yourself at your young age to think you have learned all there is to learn about religious history and faiths that have permeated human history for eons to have come to such stern conclusions while you hypocritically mocking others for doing the same.
