A while ago, a friend of mine asked me "how far you can go" with pencil drawing. I am still more or less afraid of paint, and I've almost always preferred the pencil drawings of the contemporary realist artists I like. Drawing is indeed an art form all by itself, and is not limited to producing preliminary drawings for paintings.
Of course, sticking with drawing because of giving in to my fear of paint is no good, but it's also OK to like drawing for its own sake.
And as for "how far you can go"...
One of the prize winners from Artists' Daily "Shades of Gray" drawing contest.