I notice fewer people wearing fragrance, but *when* I notice, if the situation seems appropriate for it, I pay a compliment. I do this even if I don't like the perfume : a) so that I might learn the name of the perfume for future reference (off the test list); b) to encourage perfume wearing, b/c frankly, I'm thrilled to experience perfume, even when it is not something I'd wear myself.
I have recently detected (and verified!) Hiris, Infusion d'Iris , Opium, Songes, Giorgio, Calyx, Chanel No.19, Obsession, Chanel No. 5, Coco Mademoiselle., Elixir. Also noticed (but was unable to ID myself): VS Pink, Wonderstruck, Allure, Ciara. The Ciara smelled *so* familiar but I couldn't place it.
When I began teaching, long ago, I could ID at least 50% of the perfume trails left by fragrant wrists on on hand-written assignments. Those days are long gone (along with pens and lined paper). I now often ask my students on the first day of class to introduce themselves and to mention their favorite smells (not necessarily perfume). It helps me learn their names much more quickly than 'What's your major?" Most of the women who mention perfume (and that's most of them) indeed like fruity florals. The men never, ever mention perfume. They mention salt air, snow, bread, bakeries..So far no bacon!
Like others who have posted above, I notice more perfume more often when at special events. Also at professional conferences.
The difference in perfume culture in the US and France has become astonishing. I rarely catch a sillage walking around indoors or outdoors in the US. But the mix of perfumes on the streets and métros of Paris? Yowza.