I am an advanced beginner in the world of 3D design and printing. I use Tinkercad because other programs seem too complex for my aging mind, or because I am too impatient :) . Maybe one day I will spend the time to learn a more robust app. My designs usually fill a need for which I can't find an available solution, or because I am curious about an idea I have. I enjoy it when my designs can be a benefit for other people.