degree of clicking / buzzing seems highly variable.
i have four rear wheels currently (three bikes)
one is, i think, completely silent (sturmey archer IGH)
one is sometimes nearly silent, sometimes clicks a bit. (roval terra clx, DT swiss ratchet EXP)
one is always noticeable but rarely objectionable (DT swiss R470)
one is generally pretty loud, noticeable always and sometimes annoyingly so. (roval alpinist CLX II, also DT swiss ratchet EXP)
most of the time i’d prefer them to be silent. it’s useful that they’re not on paths and crowded bike lanes where you naturally slow down before passing and that gives the person you’re about to pass a little BZZSZZT warning. i try and pedal for most descents, but when i’m not, the buzzing kind of kills the vibe.