One piece of advice my late grandmother gave me (when I was a young teen) was to travel the world first, before traveling the US, because you can always see the home country later in age (if I'm afforded a long life, that is), but going international gets exponentially harder as you age & run out of energy, time, & physical capabilities. So I have not made it a priority to see all 50 states at this time and there are probably more states I haven't been to than those I have seen. However I have almost as many countries under my belt as states, so I feel pretty good about my travels so far.
States I have been to: Texas (obvi), Alaska, Washington, Oregon, California, Nevada, Arizona, New Mexico, Colorado, Wisconsin, Missouri, Oklahoma, Arkansas, Louisiana, Alabama, Mississippi, Tennessee, Georgia, Florida & Ohio. (5 of these are thanks to our CFN Board Meetings!!)
Countries I have been to: Mexico, Costa Rica, Nicaragua, Honduras (the islands only), Bahamas, Jamaica, Spain, France, Italy, England, Holland, Denmark, Croatia, Slovenia, Germany
I would much rather touch foot on all 7 continents than see all 50 states, personally, because its much more fulfilling & exciting being in crazy cool places so far from what I'm used to. I just love that part of traveling the most - seeing the unfamiliar rather than the familiar.