I've experienced really variable keyboards on my 100-series 'Books, the 180 and parts-165 being rather stiff in particular, but the 145B was excellent. I bought a replacement for the 180 from a recycler which turned out to be almost as good as the 145B's keyboard. I have been fortunate in that the keyboards on the 190, 190cs, and both 5300cs machines have been excellent, but the 500s have been pretty poor, except for the one in the parts-520c which I had planned to swap into the 540c when instead I somehow murdered the entire machine! Thankfully, not necessarily permanently.
Initially I started with DOS lunchboxes - which I really like, but at 20+ pounds or so are hopelessly impractical. But at least they date from the age when keyboards were generally fairly good or even excellent. The best I've used wasn't even DOS, but a TRS-80 Model 4P. There has never been a better keyboard than this has, but I need something a bit more capable from time to time, so next was a Compaq Portable III, and then a true DOS marvel, NEC Powermate Portable. This is a stunning computer to work on, but the need to sometimes map out complex diagrams brought me back to the Mac platform.
At this point I thought my solution would be a portable machine, but realized this wouldn't be the best way to do it because the feel of the system is different on my lap versus on a desk, so the machines might be better to be different too - then all I would need is the means to move the files between home and work every day. To that end, since the desk in my office has limited space, I was using a 17-inch G4 iMac at home, and G4 Mac mini, or RPi 4B/Sheepshaver at work (both running Mac OS 9) with brown key mechanical TKL keyboard. This worked pretty well, except the G4 iMac was a bit of a big lump on my coffee table when not in use. Great system though, particularly with an SSD instead of the original HD.
Then came the PowerBooks, but only after a Classic II I'd bought and had used as my home machine, with an AEKII and ADB trackball, failed because it needed a recap. I'd used it long enough to realize that instead of a 9-inch screen on the coffee table, a 9-inch screen on my lap would be plenty enough.
Hence the arrival of the 145B, which .... yes, well, precipitated everything else as I have tried to find what works best for me. The 100-series remain my favorites in terms of sheer design and their place in history, the PDQ I have at home is the most awe-inspiring in terms of performance and sheer joy to use, and 'Nimitz', my 17-inch G4 PowerBook, is routinely used at work for a number of practical tasks, but the 190/5300 family are the best I have come across in overall suitability for my needs. Perfect they are not, but excellent even so.
At least until my recapped Classic II AB and LB come back... then all bets are off!