Played the drums until I was about 30 and then got tired of ticking off my neighbors. (Also, a drum set isn't the most portable of instruments.) It's tough to stop drumming, though, so Iron Jack got me a really good set of bongos and I'm planning on reacquainting myself with the bodhran. And when I turned 40 I took up ... the ukelele.
Iron Jack's much more musically inclined than me; he's a terrific singer and plays the guitar, keyboards, squeezebox and harmonica.