So I meant to get a book cover drawn for me a long, long time ago. Sometimes I see artists that could fill the role of doing a paid cover for me, but I get hesitant because I have a problem.
I can't visualize my protagonist as well as I'd like to. I have a vague idea of his features, his hair, his eyes, etc, but beyond that - I feel like I'm at the whims of the artist, and I just have to hope and pray they draw it in a way I like the first time around (because I know it would be trouble for them and possibly rejection to ask them to redo it).
I know facial features signify personality (physiognomy), but I'm not well versed on that, and I dread the possibility of the characters on the cover turning out unfitting to their personalities. I was planning on having two full body characters - Will and Galley on the cover - but I'd hate to dump 50 or 60 dollars on a commission only to feel completely unsatisfied.
For anyone who's worked with artists, has it ever been a painful process for you to get your characters drawn right?
To give an example of "not well versed",

I can see the personality in Jotaro's face, but I can't quite put a finger on what brings it out. All I can do is make vague guesses. Maybe the long, furrowed, bushy eyebrows gives him a certain strength of conviction? Maybe the pointy ears make him look sharp? Maybe the thicker lower lip makes him look tougher? Maybe the narrowed eyes make him look like a no-nonsense guy?
When analyzing a face that's already drawn, I can point out the obvious, but I can't spontaneously visualize these kinds of details too well if you were to ask me what the face of my protagonist might look like.
You know what somebody should make? If it hasn't already been done, some artist should make a program with a huge list of facial features. Hundreds of noses, mouths, eyes, and when you input in a personality trait - it lists the strongest matches for whichever facial category you're looking at. I would pay money for something like that.