Yes, that is true.
If you want to get to know all the facts of the girls, then you actually want less affection. Affection is what nets you more story line/ pictures, and after you get all of the girl's pictures, thats when you stop getting quests for her.
As stated before, if you refresh your quests, there is a high chance of getting something easy, like just corn as the request. Ive had a few refreshes that after waiting the 10 minutes, i got quests that actually required stuff i have in my inventory, and those are stuff i needed to get rid of anyway.
For me, i just refresh anything that doesn't require salads or cheese. I log on every 2 hours, to not only pick up my items for the requests, but actually buy the materials needed to update my barn. And note that you can hold onto completed requests. I save them for the next chest, and then blast them all one after another.
I know there is a wikia with all the girls answers and stuff, but i kind of wanted to make an official wiki for it here. Just waiting on a mod to create the wiki