The treble clef is not the easiest thing in the world to draw. For no special reason (other than I was daydreaming in choir practice, and happened to wonder if I could draw one of these by hand ... and couldn't do it), I was curious how to draw one correctly. This book I discovered in the library, read through it and did, in fact, learn how to draw a very nice looking treble clef. And a bass clef, too, for that matter. Better yet, I learned a lot about music notation just from seeing what a composer has to do to make something understandable.
It is a lot like doing math problems, actually. In both cases, you have to be neat enough so you can go back and understand what, exactly, you intended. But not be so neat that you never get anything done.
I have no intentions of composing music, and will stick to my field of math, but I am glad to know much more about how music is written. And how to make a well executed G clef. Plus its friend, the F clef. Pretty awesome.