on my basic signature tutorial i have a section where you make a 3 pixel border (like hte ones on alot of my sigs, that go black/lightcolor/black around the outside)
but like he said...that sig is good, but you will make ones that surpass that ones in their own ways, alot of people like simple sigs, or abstract sigs, or grunge sigs, or cluttered sigs...so it is a good idea not to rush into things, that way you can get alot of experience in each section....i specialize in abstract and some cluttered sigs...although i have dabbled in some simple and grunge sigs from time to time.