I have been to MA for 1/2 of a football game but no overnight stay. I was surprised at the number of states on my list of spending at least one night, and most were more than one night. I still need to go to AZ, CT, DE, MA, ME, MS, MT, NH, OR, UT, VA, VT, WA, & WV. It is possible tbat we stayed in VA when we visited DC on the way to Duke my sophomore year but I'm not sure.
I can add 9 foreign countries. If the overnight stay requirement is removed, I can add an unexpected landing in Pakistan and a scheduled refueling in Iran.