Nice little article on the development of Mac laptops over the past 20 years. See From Mac Portable to MacBook Pro: 20 years of Apple laptops – Ars Technica.

In order of the ones I’ve owned/used…

Macintosh Portable (back in 91-93 for work) – very heavy, but the trackball worked well.
Powerbook 520c – bought one in 1995 (esp. with the ethernet) back when trackpads were new. Worked well, but sold it to get PowerMac 6100.
Powerbook 150 – best machine I’ve every had for plain writing. A keyboard you can hit, no bells and whistles. Great with Word 5.
12″ G3 iBook (White, twin USB) – got me through the PhD, but ran out of steam towards the end. Still working as a ‘netbook’ at home.
15″ MacBook Pro – day to day machine. Works well, though it’s a bit heavy to carry everyday.