Come on. First place has gotta be the PowerBook 100.
I thought with the emphasis on repair within the geek community today we'd go for the Macintosh Portable, which is so modular and repairable that Jean-Louis Gassée was able to build it directly on stage when introducing it.
Nope. ThinkPad with the butterfly keyboard.
PowerBook Duo or 2400C - surely! :)
https://en.wikipedia.org/wiki/PowerBook_Duo https://en.wikipedia.org/wiki/PowerBook_2400c
Wow - how was I impressed with a laptop "only" weighing 2kg?!