In signatures try to use standard fonts that don't look too flashy. You try to make a nice signature and the text should compliment it, unless you are making a typography piece I suggest you don't let your text draw the attention.
I suggest you read some tutorials, one of the best beginner tutorials (in my opinion) is this one by Senthrax:
http://senthrax.deviantart.com/art/F...orial-55042010