Take your time with a personal project. You've got the instincts of an artisan. Instead of mass producing something, you'd rather create something unique and well-crafted. It may be necessary to take several attempts before hitting upon a good prototype. If at first you don't succeed, try again. Keep a notebook while you work. It will point you in a more productive direction. Once you find the right formula, you'll be able to sell the fruits of your labour for a tidy profit.