I never looked at this thread before, but just read the whole thing through in one sitting. On the spectrum of dressy, the only one here more casual than I usually am is brokeplex.
I went out this morning to take my husbie to his hand surgery (he broke his finger), and wore rayon sort of palazzo/gaucho pants with a fine (meaning small) black and white pattern on them, a turquoise sleeveless tank, with a deep violet linen long sleeve shirt over it. And slide sandals.
When I got home I took off the top part and replaced it with the t shirt I was wearing yesterday evening, which I bought as a tribute to Ennis and Jack a couple of years ago. It's a "nice" T shirt in a soft cotton, with a blue and brown mosaic-ish pattern on it. (I'm pretty sure I wore it at some point at last year's BBQ, because I wore it a LOT last year.) The pattern clashes with the pants, and I'll adjust the outfit before go out again.