To not be so indecisive when it comes to my keyboard choices.
I went ahead and bought a HHKB, got it last week and enjoyed for it a week, switched back to my MX red for a few hours and since coming back to my HHKB, I'm just not enjoying it as much anymore.
fml.
Give it more time. Use it exclusively for a month. Get used to the layout. The beauty of where Control is located, where the backspace is located. The logical placement of the cursor arrows on the function layer. Then try to use your other keyboard(s).
The feeling of oneness with cup rubber will grow on you, like a fungus. At first you will think, why am I using this? They are just rubber domes. Then you will get used to typing on them. Then you will find yourself actually sorta liking the feeling. I know, it's strange to go from a cheap rubberdome, to MX with its purely mechanical feel, and then finding yourself getting comfortable with using what amounts to a fancy rubberdome again. But that's how it happens. And that layout seals the deal.