I play piano, and have been for many, many years. In fact, it's been so long since I started playing that I should be a superb performer and pianist by now. I'm not though, because I interest more simply in learning to play and experiment with interesting sheet music, rather than to excel in technique. There's just so many interesting sounds, such a range of texture you can achieve on the piano I find...
You want to learn accordion eh? My dad owns an impressive collection of old restored button box accordions, and I've taught myself to play some tunes on there. It's easy to learn button box by ear. Just get your hands on one and have a hoot. Keyboard accordion, on the other hand, is a little less intuitive to play.
Anyway, yes, piano, as with anything I ever do or experience affects my state of mind, thus affecting my tracking. Exposure to different sounds and experimentation on piano inspires me the most, I think.