Mine has to be the cordless Milwaukee M4 screw/hex driver. From drilling simple, smaller holes to driving pretty stout fasteners, it has been my go-to power tool for years now. It is lightweight, compact, folds the the middle, and has a slick quick-release hex chuck. I use it for any light-medium duty jobs, like furniture assembly to electrical screw and beyond. It has excellent battery life, a two-speed transmission, and 20 torque settings. It is significantly more lightweight than a traditional 'gun' style drill/driver, so zero fatigue for all day use. I've had mine for 8+ years with zero issues. Not a paid endorsement, just a happy customer.
