I draft in CAD following the same standards that I was taught when drafting by hand. I have created lots of symbols based on how I would draw them on paper. I am sure we all do that.
Frankly, I think that everyone should be taught to draft by hand before CAD. Generally everyone I know who started hand drafting draw much otter plates in CAD than people who only learned CAD. Actually, one of the things I always liked about Vectorworks is that it feels more like hand drafting to me than AutoCAD.
When I was in college, as a tech or design major, the following courses were all required, full semester courses: Hand drafting, CAD, Lighting Design 1, and Basic Lighting Tech.I have mixed feelings about the need to learn hand drafting. On one hand I think learning to use a pencil is possibly the only way to learn what needs to be on the drawing and how to get it there. On the other hand, I sometimes feel that having to learn by hand is wasted time better spend getting better at using CAD, but a moot point as drafting and paperwork for lighting isn't taught here at BC. Sigh....
Part of the 2nd is that I see so many poorly skilled students about to move on to becoming professionals whose CAD skills are so weak. I just finished my 2nd show in 6 mos. with a Dept. of Theater student designing a mainstage production who had never had a class in how to draft a light plot and create the associated paperwork (the 2nd such) This 2nd student had never had a Vectorworks class, which in any event is only a class to learn how to draft for a scenic design and had to learn VW and Lightwright pretty much by themselves over the summer. I'd much prefer seeing them taking some training in Light Plot in CAD creation then doing a hand drafting class.