> Ugh light gray keyboard is ugly if the rest of your computer hardware isn't in light gray (which is common these days).
I think it looks pretty good but I have the version with blank keycaps which I use on a white desk so I think it fits in pretty well.
> Just the price at 220 USD seems... expensive.
It is unfortunately expensive. This is mostly due to the switches since it uses electrostatic capacitive Topre switches[1] and not Cherry MX-style switches which are otherwise very common in keyboards nowadays.
> How noisy are these switches?
The stock version is fairly noisy but nowhere near as noisy as say Cherry MX Blue or buckling spring switches. It really depends on what the keyboard is on though since the stock feet are pretty bad which means the sound can get amplified by the table that it's on (many people put some shelf liner under it).
There is a quieter Type-S version that's more expensive but you can achieve the same affect by modifying the stock version.
Some typing videos:
Stock: https://www.youtube.com/watch?v=1hWTxQqoIuY
Modified stock: https://www.youtube.com/watch?v=FJ1aI3HmF2E
Type S vs. stock comparison: https://www.youtube.com/watch?v=KSimmbuFGpQ
> Also, what's up with keyboard not supporting USB 3?
The HHKB Pro 2 was introduced in 2006, two years before the USB 3.0 specification had been completed. A Pro 3 version has yet to be announced but they did release a Bluetooth version two years ago.
[1]: https://deskthority.net/wiki/Topre_switch