I know that, and that's why I'm better at the piano than gymnastics, because I simply didn't put any effort on stuff I didn't like. What surprises me is that you did an important effort, though you say you didn't grab any reward out of it. That seems unusual to say the less - Everything I've spent a significant time practising, I did because either I liked it, or I rapidly got some reward (like in sports), or eventually because I was under external constraint (like going to school).