one of the most irritating things in commission/paid work that I hate is people who give you feedback but can't give it in one pass.
It takes time out of my day and schedule to go in and make your change requests, so when I send them off and your next response back is "oh by the way here are more changes I didn't mention last time" you are single-handedly the reason artists charge for more changes.
It takes time out of my day to adjust your work, please be courteous and take sufficient time to review it and send all changes in one damn go. I have literally had to delay work because of shit like this!
And no "sorry for being nitpicky" doesnt soften the blow, being nitpicky isnt the issue
Expecting me to block more time out of my day because you couldn't arse to be thorough in your review is, because now this person was supposed to be done today and they are absolutely delayed until tomorrow