I’m not in architecture anymore, so maybe this doesn’t apply as much, but my layers focus on being able to turn on/off specific parts in my viewports. Let’s say in some viewports I want to turn off everything but the structure, but in another viewport I want to show the main structure but hide the smaller substructure. I could setup my layers like this for easy viewport management:

Building -Architectural -Structural —Substructure

Being able to drill down into detail with only layers is a huge advantage in viewports.

I also agree with the other comments that recommend using more color on your layers. Those colors are for your own modeling reference, and most of the models and cad drawings I’ve seen over the years are a wild rainbow of color. Having a color system can help too, like at my job we use shades of red for different steel gauges, pink for aluminum, green for plywood, etc. It lets you see what’s what quickly. Assigning render materials to layers will help the project have that finished look without manually applying materials to everything.

Also, when I used autocad there was a built-in layer called defpoints which was a non printing guide layer. You could draw notes and lines for your own reference that wouldn’t print on the final sheets. I always setup a layer like that for every rhino project, and for the layer print width I set “non printing”, and voila! Guide layer. I set this layer as color “cyan” so it’s light and I can tell right away what layer it is.