I grew up as this very carefree, happy kid then things turned darker for me. Maybe it was because I saw that the world wasn't as happy a place as I had hoped it would be for me.
Once you get to that point when you can just be yourself and relax, I just think that you're so much happier in general.
Thinking about what songs are coming next instead of just relaxing, breathing and playing from my heart. Sometimes it can get to be almost like the enemy.