It's my opinion that these matter little to nothing. I know. It seems strange especially from the newest batch to start applying for residency - people wanted you so "well rounded" for medical school. Most PD's just want responsible people who they can train to be practicing physicians and don't really give a sheet about your piano playing or work with the homeless. It's interesting, it can't hurt you, but don't count on extracurricular's giving you a bounce.