Used to have an iguana. I agree the both the Fe as well as introverts in general like quiet lizard. My iguana was very intelligent. It might have been because I always had classical music playing near her terrarium.
She was house trained and when she wanted to go to the bathroom while cruising around the house she would scratch on the back yard door I would open it and she would go outside to do her business and then would scratch on the door to be let back in. She would sit on my shoulder and I would take her for a walk.
Hormones or whatever she went totally more and more crazy or Jurassic. I had to give her to some hippies. It kill me but it was too difficult for me to keep her in her teriarium after we were used to so much freedom.