I'm down to four "US" states that I haven't visited: Arkansas, Alabama, South Dakota, Mississippi. Just hit OK three weeks ago.
BTW, this thread begs a question I've had for a while, that I was intending to pose at the PIP. How many countries have we visited? However before this is formally introduced as a topic, how does one define a "country"?
For example, do you count a US territory such as Puerto Rico and Virgin Islands as a separate "country"?