I had a female iguana for eight years. Got her when she was about 8 inches long. She got about four feet long (nose to tip of tail). Females can get pretty tame, and they're smart enough to recognize different people. She was very trusting and even affectionate towards me, but often skitterish towards people she perceived as strangers, especially if I wasn't in the room with them. Unfortunately, she inhaled some of her food one day, developed aspiration pnumonia and passed away. Exotics are tricky to deal with... takes a lot of research, patience and money (medical bills are usually a little on the high side). Still, I'm currently considering getting a chameleon (either a Veiled or Panther), and my wife and I are planning on setting up a marine aquarium in the next couple years. We're currently in the research/saving up cash phase right now.
Damn, that sucks your iguana died, especially like that...sounds like a nice pet to have too.