1) How do you make it so your songs don't all start to sound similar? Is it all about the chord progression or what?
2) Do you tend to write songs that are directly related to things you are going through or feelings you're feeling or have felt etc? Or do you write character songs? (You know like "Boy Named Sue", Cash has a loot of character songs).
3) If you generally write one or the other (personal songs/character songs), do you ever try to write the other or something totally out of your zone? Do you succeed generally or just give up and stick to what you know?
4) Any other tips/tricks you use when songwriting?