Many of us on platforms like this are introverts, or autistic, or have social anxiety, or for whatever reason, have trouble meeting new people or engaging with strangers. If someone wanted to engage you in conversation, what topic would you be happiest to talk about?
Iguanas are plenty interesting to me, though I imagine a tegu probably is more sociable. My personal experience with lizards has been with geckos, but I hear that tegus tend to be very friendly, for a lizard of their size.