I came back after a year, but after spending 18 months in the states, wanted to go travelling again. I'm currently staying in Taiwan, and periodically travel to the neighboring countries.
I'm not sure whether it was a good decision or not. It felt like I unplugged myself from my peers, friends, and culture. After coming back, I felt out of place, and just not into what everyone else around me was. It's strange how much a shared perspective on life seems to matter regards to enjoying your relationships with others. It was like I was being slowly wrapped in a spider's web, being bombarded with the thoughts and concerns of others that I couldn't relate to anymore.
There was quite a lot of loneliness I had to deal with. That was the main emotion, I think, from when I started. Everyone became a foreigner to me after awhile.
I wasn't sure about mentioning this, but I think it's kind of important. I know of two other people who travelled like I did.. They both were really smart, both into IT, paid well, and they both (separately) went travelling for an extended period of time and ended up committing suicide. I can't really speak for why they did it. I know I felt depressed for a period of time, but got out of it.
However, it is really fascinating going to a new culture. And the longer you stay in a single place, the further the intricacies of the culture are revealed to you. There is something that is really hard to describe when you let people from other cultures rub off on you. After coming back to the states, I used to have dreams of my trip, nearly every night, coupled with an intense feeling of longing, which is a big reason as to why I left again, the second time.
So, I learned a lot of amazing things, but at the same time, I think I lost something that I can never get back.
But heck, my sadness may have to do with not needing to work anymore and adjusting to that life. Or because I've always been an introvert, and becoming an outsider, too, was just too much to overcome in order to establish solid relationships with people from my own culture again. Or because I had a tough childhood, etc., etc. I really don't have a conclusion, and probably never will.
YMMV. That's all I can say, really.