Piano - Started at the age of 8, only did it for a year at school and went on to occasionally play it at home, but I'm horrible at it... Since I haven't been doing actively.
Guitar - Started when I was 16, got some good practice out of it. Theoretically I'd be able to pose as lead guitarist, but I'm not all that confident to actually do it.
Bass - Started when I was 17. Funny story right there. For some stupid reason I joined a garage rock band, but they already had a guitarist, so they told me to play the bass. Got into it very quickly and that thing has been my instrument of choice ever since, even though I've been through several bands in the meantime.