Agree with the above posters.
Feedback is completely OPTIONAL. As a seller, I will not leave FB for a buyer until they leave it for me and I know they didn't ding my DSR's. There is no sense in rewarding a buyer with positive FB when they turn out to be a giant pain in the ***.
Some buyers will say that they "paid immediately" so they deserve positive FB. Bullfeathers! Just because they pay immediately does not mean it's a positive transaction for me, the seller. You can "pay immediately"......then complain, lie or hold me hostage after the sale because you didn't read the listing, don't like the item or have buyers' remorse. OR, you can leave me, the seller, positive FB and ding the hell out of my stars, which still results in a defect.
In fact - since I'm winding down my inventory, I just quit leaving FB for buyers. It's meaningless now, anyway.