Mine came about because I remembered something I saw on Art Attack when I was eight. They were doing something about how, if you were signing autographs, you could come up with something small and creative so you could sign thousands in minutes. Apparently it stuck with me, because it was the first thing I thought of when I first needed to sign something. Practiced it on paper a couple of times, and then put it on whatever it was. (Debit card?)
It's more a sort of emblem than a signature. Combined the R with the W. Three strokes. Very concise. I'll sometimes write the rest of my surname after the W, which I used to do because everyone has long signatures and I thought it was obligatory, but less often nowadays.
'Course, sometimes I like to just draw a picture. Usually smiley faces, but I've done a house, the sun, and a bird in the last few weeks or so. Receipts. Nice to take your time on them, do a proper little line drawing.
Drew a picture of a cow as my signature on a disclosure agreement form lately... that backfired. Had to spend about five minutes convincing the fella that it was my real signature. With a straight face. Didn't have the heart to admit it was a joke. Still don't.