I keep going back and forth. I am almost exactly like both of the descriptions. The good the bad and the ugly of INFP and ENFP seem to describe me. I think I am ENFP, but only by a margin. Seriously can't I be both?
I am starting to think I became introverted because of my sucky childhood, but I enjoy my extroverted side and am becoming much more so as I get older. Even so it seems weird that I can align myself so closely with different types.
I'm also in a transition period so it's tougher for me to tell as I'm growing a lot right now. I have heard the ENFP called the shy extrovert, and I do think that describes me half the time, the other half I'm swinging from the chandeliers.