Right now... almost all CAD programs are designed for professionals, and the hobbyist versions are just cut-down professional CAD programs. The biggest exception I see is SketchUp, which has a very simple and direct way of drawing directly on objects, and it's very easy to pick up, but it has no understanding of solids, parametric measurements, assemblies, or any of that. And so SketchUp is super popular with woodworkers, home remodeling agencies, small businesses, all these people we wouldn't normally think of as "big professional CAD users" even if that means they lose out on some of the improvements that professional CAD packages have (especially because SketchUp really hasn't changed much in over a decade).
A 3D solid parametric modeler with the ease of use of getting started with SketchUp. SketchUp with solids. I can dream.