Hello American friends (i.e. non Republicans)

I'm from Australia. Us Australians travel a lot, because we are isolated and on an island, this leaves us no choice if we want to see other countries. You my American friends have other landlocked countries you can visit, so can technically travel to other countries without going overseas.

When I do run into Americans overseas and mention I'm from Australia, I virtually always hear "Oh nice, I'd like to go there someday". But you can kinda tell it's lip service and that they probably won't go there. There's no conviction in their voice, it's just polite speak.

Which got me doing a quick Google and I found this article from the Huffington Post.
[huffingtonpost.com]

Although a little old, it makes some interested best estimates of the true percentage of Americans who travel overseas. I also learned there's been a tiny bit of growth in the last 9 years - the BBC reports 40% of Americans now hold passports compared to 35% when the Huff Post article was written. But nothing to significantly alter the fact that out of 4% of Americans who travel o/s, only a paltry 2% of the come to Australia.

So my question are: Why aren't you travelling? Why aren't you travelling here? I'd love to hear reasons. Are they...

1. Cost
2. Time (you only get 2 weeks per year vacation there, don't you?)
3. Prefer to go somewhere else
4. Fear of flying
5. Something else?

Cheers, Brett.