I'm with Akira - I play drums, bass, piano and cello as well as guitar. I think playing each gives you an insight and helps you work with the other instruments. I am ridiculously bad on piano, but playing the drums helped me with rhythm, and is/was a huge benefit to my guitar playing.

Plus, it's pretty good fun, and when I don't want to play guitar I can have a break on the drums instead... \m/ :cool: