I want to be good at the things which bring happiness, beauty, satisfaction, fulfillment and/or enjoyment. This is why it is not so important to me to be good at school or to "have a career", and far more important to me to be attractive, to be magical, and to be good at arts and games (none of which I am). All of these things have, on some level, to do with fun, with enjoying or enriching life, even if only temporarily. That is what makes me value them as important.