favorite tool is my welder because it's fun to use, can stick things together so they won't come apart, involves spark for visual satisfaction, and electricity for technical satisfaction, creates wonderful buzzing noises and noxious very garage repair like fumes, it's great to see a once rusty hunk of car become bright shiny new and sound metal, and can set things on fire, intentionally and sometimes not intentionally, so it's full of surprises, plus I can use my welding helmet to scare the bejeezus out of my daughter at night. How do you top that? Second favorite is my paint gun. The final stage to a job occasionally actually well done!