A love song must respect the canons of music beauty, entering the fibers of those who are listening. It must make them dream and pleasantly introduce them to the universe of love.
I don't know if One Direction will stand the test of time. I have a niece who goes crazy for them. But the only way to judge art is to wait and see if it becomes evergreen. This takes a bit of time. Adele is a very good musician and I'd like to sing with her. But, again, time will tell if her music will become evergreen.
A positive frame of mind will definitely enhance your travelling experience. If I'm not in a positive frame of mind then the whole thing definitely becomes more of a challenge for me.
I don't like crying. I'm a country boy, and we're the product of our upbringing. As a boy, I was told that men don't cry.