There are plenty of things I wish I were better at; in truth there are very few, if any, things that I am good at anyway so plenty of room for improvement in all areas.
However, one thing I would like to be able to do is sing. Voices are generally easier to carry around than a guitar. They don’t need careful storage on a train to prevent ham-fisted barbarians from crashing luggage on top of them. Nor do they need restringing or other costly refinement. Maintenance is generally simple and cheap, and practice can take place anywhere, not only in the shower.
When I was little I discovered what “tone-deaf” meant because there was a boy in my class who was. He belted out hymns in assembly enthusiastically but in his own unique and frankly painful style, unrelated to any tune or rhythm the rest of us were following. In a hall of a couple of hundred children he could be heard unmistakably, bellowing and warbling to his very own set of rules. And he did not know this.
I played recorder and sang along with everyone and even sang in the small choir. So it was a horrible shock to arrive at secondary school and be told by the music teacher to mime. I don’t do singing any more. This is my service to humanity. I am not tone deaf, but I certainly cannot carry a tune, and now I know that, I no longer inflict my singing on others (except when playing Rock Band).