Wanna introduce you to my new product 2000+ Custom Shapes Kitbash, on which I was working for a while. Especially useful for Concept art, sketching, and illustrations. It is one of the biggest packs (kit) of Professional Custom shapes on the market.
It can help you to improve your workflow and save a lot of time with ready forms and destabilizations.
1. The biggest point is that most of these custom shapes have their own form and are separate.