You've pretty much nailed it for me; I'm a tall guy (6'4" or 193cm), I'm mildly claustrophobic, and I get stressed on any public transit. I only get two weeks of leave per year, which I have to spend about 40% on certain days like our wedding anniversary and the few camping trips we take every year. We don't make a lot of money and we're trying to pay off old debt and the house, so there's not much left over for traveling outside the Southeast (we live just outside Atlanta, Georgia).

All of that said, it's not that I'm not interested in traveling, it's just that it's not feasible right now, and I fear that once it becomes so, the US will be so isolationist that it will be much more difficult to enter and leave.