Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I hope I don't jinx myself...

Powerbook 170 (yes, the original!)
Powerbook Ti 550
Powerbook Al 1.25 (refurb from Apple Store online)
MacBook Pro C2D 2.16 (ditto)
MacBook Pro orig. unibody 2.53 (ditto)

none had any serious issues, in fact none had any issues... well, except the latest unibody which when running on the 9400 and external monitor, the ext. monitor flashes once in a while.

in fact, i never bought applecare until the unibody, which somehow worried me mainly because of the monitor flashing thing.
 
I've got a MacBook Pro Intel Core Duo 2.16 that's been chugging along for a little over four years now. I'm hoping to upgrade this winter and keeping my fingers crossed this thing keeps going for a few more months.
 
I have or have owned:

iPod Nano 3rd gen
iPhone 3G
iPhone 4
Macbook Pro 13" mid-2009

No problems on any of them.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.