Like just lightly glide your fingers across the keys and you should feel/hear the rattle. That same rattle continues as you type, it's just mixed in with the sound of bottoming out.
For comparison, my mech is a solid feeling piece of aluminum, the keys have 0 wobble, and there are no rattles at all.
It's night and day, I could never go back to a HHKB.
Having used every tactile from Zilents to Holy Pandas, these are the first switches I'd consider a strict upgrade over the competition (including Topres)
They're crisp, come in silent and unsilenced (I prefer silent), and have uncanny tolerances which results in a consistency Topres can't match.
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.