I read THIS article in the NYT, "In Praise of Mediocrity" and it resonated with me. There's NOTHING WRONG with playing a musical instrument just for the fun of learning how to do it and for the joy of performing for the your own pleasure and the pleasure of your listeners. It is, after all, as the author points out, one important reason we have leisure time. I love my work. But one reason I work is so I can play music more and enjoy it more richly.