Time was when I was fairly musical, though these days I'm limited to listening and whistling along (sometimes even in tune...)
Used to play the clarinet to grade 5, but only took that grade to appease parents as part of a deal "you can drop it after you pass grade 5"... to be fair, I had enjoyed it previously, but I suppose practice became too much of a chore, and the various grade examinations were rather stressful. Also I was in music lessons with someone who was initially not as good as I was, and subsequently many times better, and now plays Double Bass in the Philharmonia Orchestra. He was brilliant, seriously... Clarinet, Violin, Double Bass, composition... his brother was also fantastic and got nominated for the Mercury Prize in 2012. I wonder how much watching him being better than me was off-putting. Would be a shame if so...
Anyway, after that I played the piano but never took any grades and stopped playing when I went to University (the practice room was at the end of a maze, basically). Aside from a brief twiddle on a nearby organ I've not touched a keyboard or an instrument in years. Oh well.