I agree with Stormbind here. Art cannot simply be "an expression of the artist" - to be great, Art must connect with us and move us, and visual art, if it is to connect with us, must be beautiful. Modernism, however, has taught us that there is nothing to art except your own expression and what you want to do - leading to the great decline in art education for much of the 20th century. No longer did schools teach the foundations and drawing skills required to produce realistic images on canvas or paper, and the standards continued to degrade as the students of the so called "academic" painters of the lately 19th century slowly died off, leaving no connection to the present. Modern art history has also been keen to discredit scores of these so called "academic" artists. (When's the last time you heard of Meissonier, Bougeureau, Waterhouse, Alma-Tadema, or even, to a lesser degree, John Singer Sargent? These men were some of the art giants of their times, Meissonier commanding the highest price for a painting ever during the 19th century, and Bougeureau revered as an artistic great even by Degas and other impressionists, yet up until now we've rarely heard of them, and if we did it was only in a degrading sense)
Art, if it aspires to be great, must move us and connect with us on a fundamental level, and not simply be an expression of one's individuality. That, IMHO, is not art, that's mere self-marketing.
The great masters of the past learned to draw and paint, and THEN ventured into their own styles, they didn't simply throw that education away - as has been the popular trend for a good quarter of the 20th century, a trend which, gladly, is beginning to reverse.
Here is a good site which talks about such issues (admittedly, the creators of the following link can be somewhat overzealous):
The Art Renewal Center