Mine was a 14" iBook G4 with an 80 GB HD and 768 RAM. I still have it, but the hard drive is damaged and the battery is dead, so I use it as a backup computer only now that I have a new MacBook. We had a good five years together, though.
2006 15" G4 1.25ghz with backlit keyboard (my second mac ever, after the G4 mac mini)
It is nice to see that many people seem to come over after the intel transition. I still remember the controversy, and I thought that mac resale values would plummet afterwards, since the hardware would be the same. boy was i wrong.
ibook g4 1.2 ghz 14", less than a gig of ram and a 60 gb hard drive running 10.3.9.
that thing was really great when i first got it, but now it doesn't hold a charge and just turning takes like 5 minutes so it is in its box below my dask where it will probably stay. the one thing i can't get over was the display, sure it was matte, full screen, etc, but it still shows that apple can and should put a larger display in a consumer laptop.
First apple laptop, and also first laptop ever, was a dropped MBP 17 off ebay. It worked perfectly. I still miss the keyboard, the macbook's keyboard is hard to type on in comparison, and the screen size of course.