I'm not picky as long as it is "tenkeyless" and not too bulky. I never use the number pad anyway; being right-handed, the mouse feels uncomfortably far away when the keyboard has a big bulky extra sidecar sticking out.

At present I'm using Lenovo's thinkpad-style USB keyboard (https://www.amazon.com/dp/B00F3U4TQS/). I like its slimness and the trackpoint is convenient. There's nothing especially lovely about it, but neither does it ever annoy me. It's also nice for muscle memory that all three of the computers I use regularly have exactly the same keyboard layout, whether they are portables or desktops.

I tried out the Happy Hacking keyboard, but it's been collecting dust for a year or two now. It's nice in a nostalgic way, reminiscent of the original Macintosh keyboard I used when I was first learning to type, but the long-throw keyswitches and loud clicking sound got old.