For the original questions - What comes to mind? excitement and arousal. Love braless. My wife will make a comment like "I saw you notice." Of which I always say "Yes. She had beautiful eyes!"
She will wear a lace unlined bra with a somewhat sheer shirt when we are out of town but that's as close as I get to braless with her in public. Inside, it's bra off in the evenings.
Anyways - Hoping braless comes on strong in 2022 but since it has been out for so long, I doubt. Wishful thinking? Anyone seeing a positive sign in this direction?