Ragusa - I don't think it's about personality types, I think it's about choices. Many people travel when they are young, then settle down and have kids. In fact, that's part of the whole script of settling down to the capitalist lifestyle; the idea that travel is something you do at one period of your life (along with partying), and then you give it up in favour of waged work, a suburban house, a car, and kids.
I think there are many grounds on which to criticise the guy. Personally, I buy the neocolonialist argument, and I think he owes his wife the same number of solo months of domestic labour when he returns as the time he's away. BUT I hate the whole "Everyone should be super-disciplined and boring and never drink and never have adventures because that's what adulthood and responsibility is". I do think there is more to life than creature comfort and security and status symbols, and that something gets stripped out when excitement and positive action are reduced to "making memories" in bloody Centre Parks.