Do you feel that your drawings might be missing something? But you can't quite put your finger on it?
In my roughly forty years of daily drawing, I've realized that good drawings contain an essence, an almost formulaic structure, 'ingredients' if you will...ones that can be boiled down to simple to understand ideas.
I have no doubt that your drawings contain some of these 'pillars' already. But add in a few more, and your drawings will stand solid, vibrant, and proud:)
This is not 'HOW TO DRAW' per say, but a list of things that are found in GOOD, SOLID, IMAGINATIVE DRAWINGS.