Traveling changes you, but the people at home won’t change that much.
Travel is not a vacation, it is exhausting. You have to deal with constant change.
You can get tired of traveling when you are overloaded by hundreds of impressions.
Myth and image that you have of the place is not the same way as the place.
Homesickness can strike you at any time and there is very little you can do about it.
The real culture shock will happen to you when you come home after long term travel.