The idea for an artist is to make the signature unique and recognizable without taking away from the image. There are as many different ways as there are people. Here's a sample of other artist's signatures -
Christopher Thornock signs with an iconic T in a square
Carol Maine uses 2 different signatures, her initial and her last name
Otto Lange uses and O with a number above it and to the right, the number represents the year
and I use my name (mine's bigger not out of some psychological superiority thing but because I have access to larger file sizes than are available from other artists)
Everyone is unique and their signatures show it.