For the most part, having more money and more fame make your life harder. It just does. I've seen it happen with people. You know, it's so hard to stay normal. It's so hard to stay happy. It's hard to remember why you were doing what you did in the first place.
Falling in love is awesome, but I'm never drawn to happy songs per se, so whenever you sit down to write a heartbreak song and you're happily in love, it's like, 'OK, now I have to go back to a sad place to get something good.'