Great men, unknown to their generation, have their fame among the great who have preceded them, and all true worldly fame subsides from their high estimate beyond the stars.
(Henry David Thoreau (1817-1862), U.S. philosopher, author, naturalist. A Week on the Concord and Merrimack Rivers (1849), in The Writings of Henry David Thoreau, vol. 1, p. 363, Houghton Mifflin (1906).)
Rather than trying to be well rounded in everything, think of yourself as a star. You don't want to be perfectly balanced, with every skill equally developed. You want to have several skills that you really enjoy that you can exploit and excel at, like the points of a star.