Saxophone - started on Clarinet at the tender age of 8, progressing to sax at about 13.
Guitar - always loved playing, having never been without one for the last 30 years. Strictly rhythm tho, I don't want to make it cry or sing ... :brow:
Keys - had piano lessons for a couple of years, and played synth for a band in the late 80's. Undoubtedly THE best instrument to help improve your overall musical understanding.