I thought about a legible signature. My reasoning was that it was too specific. When you're drawing an icon of a coffee-cup, you're drawing abstract shapes that

I thought about a legible signature. My reasoning was that it was too specific. When you're drawing an icon of a coffee-cup, you're drawing abstract shapes that will hit as many people with a 'coffeecup' concept. Compare this to a life drawing of 'coffee-cup on a bar in Starbucks at 9pm in Seattle on 5th avenue'. Who gives a shit who's signature it is? By drawing an abstract shape of signature I'm letting the user fill in the gaps ('yay, it's my signature'), without forcing a specific context on his mind ('oh, it's John Doe's signature').