The one where the lines go past the circle is the one I call Punk Circled-A. The one I use is more restrained, making it appear more professional and approachable (in my opinion, obviously). But I did do one with the punk-A:
. This one is drawn so it's a lot more free-form.
/sidenote: When I say drawn I mean as opposed to designed like the ones in the main post. They are all made in inkscape, but for me drawing is imperfect, while designing tries to maintain as much precision as possible, eg proper ratios, straight lines and equal spaces. While drawing is embracing the imprecision of a human hand.