Sticking strictly to mechanical keyboards, I have 2 1800s, my 60% ortho, a 3x10 ortho I won at a meetup a few months back, and a hand-built macropad I designed.
I also have a 60% case I just received that will house my next custom build.

I use the two 1800s at home, on two different computers.
I use the 60% ortho at work, and have the macropad sitting on my desk there, mostly as a decoration.
Once I finish my next build, I will be rotating that one into primary use at home, and sell one of my 1800s.

I used the 3x10 ortho for a bit, just to play around with, and get some ideas from.
That board is what threw me down the "design my own layouts" rabbit hole.
It triggered a bunch of "what ifs" in my head, which ultimately led me to my current custom layouts.