YLF is clearly a fantastic success despite or perhaps because of (what seems to me too like) the dearth of constructive criticism. The all-positive-all-the-time thing certainly makes for a very supportive environment, except for any new poster who makes the mistake of posting an honest (but certainly not mean-spirited) answer to a question asked and gets roundly taken to task for it. I do not dare post unless I feel honestly able to gush effusively.
Part of the reason I haven't posted WIWs here myself is that I don't personally feel any need for feedback let alone praise/validation for my outfits. When I was young I would have loved the gushing praise and I was a lot less confident and felt more anxious to 'fit in', but now I am much older I feel free of all that, and that feels good. That is not to say that anyone else should feel the same way: of course not! I just personally, now, unlike in my past, don't feel in the slightest bit upset by the thought that many would hate my outfits, because my style is about expressing *me* as opposed to pleasing the majority of random strangers, and in fact if anything, I gravitate to things that others have a poison eye for (high-waisted mom jeans before they were popular, anyone?!).
Which reminds me, I can think of a few times when a poster has asked specific questions about her WIW and some people have posted their honestly (not mean-spirited but) critical opinions and I have genuinely disagreed with their criticism and have honestly felt super-positive about the look, and have said so. These things are quite individual. What appeals to me definitely doesn't appeal to some others and vice versa. And that's ok.
Sarah
P.S. whilst I don't feel the need for praise or vague 'poison eye' or 'not for me' type feedback, I would love to post WIWs if I could find somewhere where posting detailed discussion and analysis including constructive criticism (i.e., clear, specific, detailed, action-oriented comments as opposed to 'poison eye'/'not for me' comments) was welcome. That kind of feedback and discussion and deconstruction would be completely fascinating and useful to me, because it could give so much more information than non-specific comments.