New experiences increase our resourcefulness by living situations you would never encounter at home, this is great experience for you when you come back to your routine. I have noticed that people who traveled a lot in life were ready to embrace change and have a natural ability of overcoming problems that others would frown upon.
When traveling with friends or family it creates memories for a lifetime. These memories will create a bond that nothing can erase no matter what happens with the friendship/relationship. It can also give a new perspective on the relationship and cement the bond forever. It also gives nice stories to tell people afterwards, you can create photo albums about your trips and when you feel nostalgic you can take an hour of your life and experience the trips again by looking at your pictures.