I really like to use a drawing marker. Setting a line is definitive.
I used a cloud motive. And a rainbow to connect things. But it became very busy because of pencil thickness. In this case, I miss a digital version. Drawing in layers, changing the opacity.
And a rainbow is colourful, difficult to do that in black and white. I could do a shading but I’ve chosen to draw less thick lines. To be honest, in this stage I would switch over to InkScape to draw controlled lines. But then it would look mechnical.
Also, most of the time, I had the need to draw in perspective.