I turned down the cliche trip to Far-east > Australia etc, etc for a year when i was in my early 20s.
As Zethor said im sure it can be a life changing experience. Half of the people i know that have done it, come back as complete Acoustic guitar strumming, no shoe wearing, bee keeping "douchenags"
I really don't see it as a big deal now in 2017. 20 or 30 years ago sure it would be a bit more exciting, now you just go online click a few buttons, flight itinerary made, check a few review sites, pick cliche packet of cuddling tigers, AK47s in Vietnam, 3 months picking fruit in Australia. Yeah be worshipped as a Westerner in some poor 3rd world Asian slum countries where they love you for the dollars you carry and only your cheap drug addled inhibitions stop you from the pleasure of the company of FiFi the ladyboy's warm embrace......
For a lot of people is the final fling of teenagehood, before growing up, getting married and ultimately losing your life to parenthood.
As long as you are NOT a parent you can do anything you want when you want.