It fluctuates with me. There are times when I would consciously plan things around how evil or Satanic it would be to do (x.) At those points, I put on my theistic hat and let people on like I truly believe in what I'm saying. In the end, I know it's all bullshit, but it does help to keep thinking to myself, "Pazuzu urges me to protect children, so these karate lessons are worth it," or "Asmodeus grants me his seductive powers for sex."
The most passionate you can be as a Satanist is just admitting to oneself that you're human.