Personally, I enjoy ballet a lot. The dancers are amazing! Also, some of the best symphonic music was writen for the ballet. As for the price, I agree that it is generally to high, but I'm not sure anyone who throws that arguement out has any real idea of just how expensive it is to put on such a production. The endowment for the arts should be helping out here more than it does.
Also, Indian Classical Dance is another great art form. I would highly recomend seeing it if you have the chance. I know that there will be a big performance this year at Seattle's Folklife Festival. It's well worth your time, not to mention the price you'll pay (the festival is free)!