Well, here are my sigs and avatars.

Sigs!
New-Old

Smudging over-done.
Weird-looking thing in bottom right
Bad drawing.

Suckish all-around

Black and white.
Monotone

Dark monotone
There are many more, just most of them are sucky (more sucky than these ones).

Avatars
New-old


As you see, I've done more sigs than avvys. But avatars are easier.