I find that I end up liking songs if I really have an idea of something I wat to write about-some problem in my life or something I want to work through; if I don't have something like that at the root of the song, then I think I end up not caring about it as much. I gravitate towards some kind of concept or idea or situation that I want to write about. Very often I have to write, rewrite and come at it from an opposite angle...and I end up writing the opposite song that I thought I was going to write.