I realized i was a Satanist while a JW. I always felt closer to the character Satan in the bible than any other character. Here is Satan, a character who questions authority, who fights against a tyrannical god who kills at will. That, i think, is a person worthy of imitation. I did not think it healthy or wise to restrict my desires whether they be carnal or anything else. So many JWs are sexually repressed and fighting addictions to pornography, masturbation, fetishes, homosexual desires etc. I found that by indulging in whatever i wanted removed these. I learned that i either didn't like it, or i liked it very much so continued doing it. So i basically lived the life of a satanist while fading from the organization. I would give talks on the platform telling the audience what they'd want to hear, but include subtle hand gestures or words and i even had various tattoos under my cheap suit.
First, welcome to the forum. Interesting story. I myself have thought of Satan the same way, but I personally don't have a lot of space in my life to dwell on it. I also have a hard time believing in Satan as it is too convenient of a character for the Bible and all that Jehovah crap make sense.
Either way, welcome, and thanks for sharing.