Drawing is a powerful tool, and learning it is no easy business either. My parent's said that I started to draw around the age of three, not only that, but a few of my uncles where artist, and where older, so I took my role model on them. Now that I'm 22 yrs old, I can honestly say that I am alot better when I was three years old...hopefully at least...
, I have three uncles in the media business, one is currently helping out with layering theatrical posters, one is an artist for Image Comics, another is an Art Director.
Now, enough of me and how I started out, I strongly believe that to how good you are is how badly do you want to be that good. If you want to really be that good, you'll work constantly on it, even if the drawing ends up looking bad, you still finish it anyways. Not only that, but I suggest that drawing at different angles, drawing people that aren't always pretty or good looking, sooner or later, it'll be second nature.
I do say that age does matter to a certain extent, for a 3yr old will certainly not be capable of a creativity or handskill of a 15yr old artist, but age becomes nothing once your older. The Pencil and Pen is a powerful tool, for it gives us the opportunity to look at the world that lies within the soul of the pencil wielder...or should I say artist.
Sorry for my ungoing blabbing :sorry: