99% of the time when shooting on the street, I hit the shutter unannounced, completely candid. When I fist started, not asking was this moral operative that somehow purified my practice, as if the Street Photography God was watching and doling out brownie points. Kind of weird, I know, but I was new to the genre and wanted to adhere to its rules as I perceived them — “I insist you take me seriously!”
I’ve loosened up a little since, hallelujah, now occasionally first asking a subject to make a portrait. I’d classify it as “Street Portraiture,” something I consider wholly separate from Street Photography, but certainly related and adjacent (and certainly worth exploring as a self-identified “street photographer”).