I’ve experimented with various keyboards but for me the sound and the action of the hhkb are my favorite. I just wish it had the layout of the Leopold FC660C.
Plastic case plus very loose tolerances on the switches = it rattles.
It's great if it doesn't bother you, it didn't really bother me until I got to experience better.
Even something as small as resting fingers on a key feels so much nicer when the switch has 0 play
But you may be right, I'm not such a keyboard aficionado, I only had a few mechanical keyboards and maybe my standards are too low (or rather, at level which keeps me happy).
But as somebody else noted if you found the holy grail please share.
And no, it's not a counterfeit.
It is not loud due to the o-rings.