I'm really enjoying this thread!
Personally, I've always thought of edgy style only in its extreme version, with leather and studs and sharp, angular lines everywhere, and dismissed it as something that wouldn't ever work for my soft, shrimpy, mild-mannered self. But I'm wondering if a little bit of edginess might not actually work for me. In particular, since I tend toward RATE and am ridiculously obsessed with comfort and with clothes that don't feel overly fussy, some edginess might help my style read as more current and purposeful rather than just as kind of path-of-least-resistance. In particular, of the elements that people mentioned, I think draping and asymmetry, juxtaposition, and some edgier shoes and accessories might be good avenues for me to explore.
Goldenpig, I really like your edgier outfits! They keep sticking in my mind as great examples of combining edge with softer, more feminine looks. I may have to try a slightly RATE-ified version sometime.