I've quickly tried some boards which confirmed my research.
Imho, Black is too heavy, didnt like the feel and sound of brown and to a lesser extent blue. I can definitely see the comfort playing with reds. (mostly filco boards)
Loved the feel and feedback of hhkb.
I have yet to try topre real force as well as sphericals.
The penumbra, toxic... Gbs are appealing though I am heading to topre with JIS layout, cylindrical at first to reduce the cost.