rOtring 600 mechanical pencil - the feel of this pencil is unlike any other writing implement I've found. It's a legend. My new goal is to find a fountain pen that I can enjoy as much as I enjoy this. Though I fear that will be a notably more expensive purchase.
Yamaha Custom Series Bb trumpet - before becoming a developer I was a semi-pro musician and this is still the most fantastic instrument I've ever worked with. I've owned it 9 years now and it still feels brand new. Every mechanism on it was perfectly made. There's no unnecessary stiffness or play in any component.