I'm a hobbyist. I was taught classical piano from an early age but only really started to enjoy it in my teens. I still play (badly) for myself. I always wanted to be a composer but I was never really taught much theory. Until recently I've contented myself with mostly doing arrangements of pieces that I like, because I can never seem to find the perfect definitive performance.
More recently I've started to teach myself harmony from text books, and I'm liking what I'm discovering.