spatial thinking or abilities
Watch some of the Sketchup video's, you'll see that it's very different from Autocad etc.
Good luck :cool:
I've had to do a little work with mechanical engineering, seems like solidworks is much more user friendly and easier to figure out early on. Overall, autocad is better known, and more flexible as it is used in many different industries. Both are probably overkill for simple projects that weekend woodworking hobbyists would need. When I get some time, I'm going to check out the other great recommendations mentioned on here.