Whenever I reach out to use my mouse from the keyboard home row, I feel a bit annoyed, and eventually I become more and more fond of keyboards with trackpoint / pointing-stick / nipple pointer. I once had all of them, but I definitely did not enjoy using each of them to the same degree. They are:
IBM Model M13 black version with buckling springs


IBM SpaceSaver II with gripping rubber domes

IBM KPD8923 Keyboard, 104-Key Trackpoint with some super smooth IMHO high quality rubber domes

ThinkPad USB Keyboard with TrackPoint with decent quality rubber domes

Nothing fancy as these are just stock keyboards.
Now I only have the ThinkPad USB Keyboard with TrackPoint, I enjoy using it, but as I use more shortcuts nowadays during my work flow, I don't have to touch my mouse so often now.
Ah, one thing: it would be nice if I can try the "inverted rubber domes" of the IBM M4-1 keyboard.
I am more recently starting to get into mechanical switches, and found out that I should be more of a Topre switch person because I like the tactile bump and I am also definitely spoiled by the super comfortable cushioning of the rubber dome switches.
Cheers,
MJ