You look great in your end-of-summer outfits, Carter. And I'm with Angie -- these all look casual enough to pass muster as casual to me, even if some nutty folks are wearing bathing suits!! (SHEESH!!!) Or maybe the word is not casual -- but effortless and relaxed. You don't look like you are trying too hard (whatever that means). You look comfortable. I think that is key when trying to set the sartorial standard. As long as you look comfortable in your own skin, others are less likely to feel threatened by your dressing more nicely than they might be. If that makes sense.
Love your idea of a challenge as well.
I need to think a bit about what my personal one would be. September is always a busy social month for me so I have lots of opportunities to dress up a bit. I've started to incorporate some of my great NAS buys into rotation, too, so that is not an issue. So I will mull on it a bit and look forward to seeing what everyone else comes up with!