Help Me Understand The Influence Of Toning/Patina On Value Of Bronze Coins

What comes to my mind is just a matter of eye appeal.
A rich even chocolate dark brown on an old coin is most worthy to me- as in Conder Tokens.
Brown or red copper for U.S. one-cent coins appeal to buyers in different ways.
If you are selling, toning may influence a potential buyer's offer up or down.
Toning can make or break a sale.
So it's not a matter of how toning affects the market value.
Toning tells me if I want to buy or not.
I guess it could be said that poor toning would get a lesser price and rich toning could get just market value.
Toning is an odd factor to me.
Some people really go for rainbow colors on silver.
So much so there are those who fake toning.
I can say this about ancient Chinese cash.
Some cash I have were so corroded, you could not identify them, so they were soaked in acid to remove the "concrete".
But then the color was so way off from being natural, after they were identified, I used some items in the oven to get them at least back to somewhat of an acceptable brown color.
Toning can be much varied.
What comes to mind is that toning may be a personal choice or preference instead of a market value influencer.