I started playing with computers and hardware when I was 7 years old. Dad worked at an electronics repair shop, and used to bring me broken amplifiers and other electronic devices to take apart and learn how they work. I loved to deconstruct things to as many elements as I could and then put them back together. One day Dad brought home our first computer and it was love at first sight. Already 8 years old, I would sit on the computer for hours, playing games, learning about the hardware and making upgrades when Dad brought in new parts for it over the years.
If there ever was such a profession, I would most definitely be a "Tweaker". I tweak everything, be it conceptual or real. I always find ways to make something better. To make it more efficient, or to expand its capabilities.