[CalRobert]

I remember being in my early 20's and hosteling around and doing pub crawls and the like and thinking "man, everyone must stop having fun when they hit 30". I imagine you're less likely to do the pub crawl/random hookups/wandering around a new city at 4 AM thing in your 50's than in your 20's (though now that I say that I know some people in their 50's who definitely keep up just fine...) Now that I'm a good way in to my thirties I definitely do less stuff like that, but then, life hasn't proved to be too dull.

Then again, I still remember fondly a couple in their 70's I met in a hostel in Prague who were finally doing their round the world trip. They were the exception though.

Regardless, though, I think that life is generally different at 40+ than at 25 and that will be manifested in travels. Even if you're the same, the folks around you won't be (people will definitely treat someone who looks 45 in a hostel differently to someone who looks 25). It's not worse (and in some ways it's much better; I like not being broke), but the experience is definitely different.