I don't think feedback should be a chore. I loathe the idea that a reader (whether that reader be me or someone reading my fic) is obligated to compose a long, detailed comment and anything else is worthless. Fuck that thinking, seriously.

I have enough stress and obligations in my life that I do not need to add another one for something that is supposed to be a way to relax. And as an author, while of course I love long, detailed comments, I know that if I were to demand only that, I would be lucky to get one comment per fic, if that, because other people also don't want reading to be a chore. I really want to know that people are enjoying my fics, and kudos gives me that information.