Had a great interview today. Turned into three interviews at a law firm, supervisor, attorney, and then with the partner. The partner told me they'd interviewed a lot of people and so far hadn't considered anyone until me, the only thing that worried him was my possible commute being too long. He told me to think about it and email him to let him know what I decided.

I really want this job, I think I'm going to learn a lot and really benefit from it. I'm crafting my thank you email. Do you guys use the formal headings? Like with my name address and contact info and then his contact info underneath? Or what do you normally do?