I have a Model 100, which is amazing. I don't have, but was always fond of the original Mac Portable and, later, the original powerbooks.
The singular, at the time, real take away about machines was that you could just close the lid and go, and it would (mostly) sleep the computer, and you could pick up where you left off.
But also, with the Powerbook design, the keyboards were very good, the track ball was in the right place, and you had those little feet in the back you could turn and raise the laptop up.
I was also very fond of the original Compaq lunchbox with the red display. We had a clone of one of those at the office, and it was great dragging SCO Unix around for remote work and demos.