Interesting topic, butterfly. I also had a simple signature, reasoning quite correctly that no-one was qualified to check it in the first place, so I wanted something I could reliably reproduce rather than fall over.
I think it does say something about you if you have a simple straightforward signature. It says you are simple and straightforward, which I would say is something I like to see.
Be yourself.
EDIT: I've since become a shifty old bastard, so I had to revise my signature.