Picked up stuff from Dylan, Kingston Trio, Chuck Berry, Louis Killen, Pat Sky, and darned near everyone else I ever listened to. Tough question. Eventually, we find the groove and stay there for a bit. Often, when songs get boring to me (as a singer), I fool around with 'interpretations' and phrasings. Guess lots of it is "Hey, I like that and I'll try it for a bit" or "Forget THAT!" and then do.