Dare I say it, the thin keyboards are one of my favorite things Apple makes! Just like the legendary IBM 101, it uses mechanical scissor keys (although, people who like the M101 will probably NEVER touch these things). On top of that, the keyboards are small, heavy, and very sturdy.
I just wish Apple would make a black one. Preferably, black & backlit, and available in the extended keyboard layout as an option.
Other favorites: The old spaceship PowerMacs. The G5/Mac Pro towers are nice, but the space ship designs always weirded people out XD
iMac G4: Kinda pointless in today's day, but they were cool
Pro Speakers: Should've been Firewire from the start (for more juice), and never that minijack. Don't even get me started about how Apple marketed the iSub and made it a giant paperweight 3 years later.
Mac Mini: I don't own one, but the current Mini is awesome - especially since the power supply is built in. HOWEVER, they were totally insane to sell it for $699 - pure greed man. That thing can't possibly cost more than $200 to build, and even if they did it should've been made cheaper (use the old case, it was fine.. just build the power supply in! ****!)
Least favorites:
* Every mouse Apple has ever made. Ever. Sure, some were iconic and very nice to look at, but they've almost all been ergonomic horrors and a ripoff for the build quality. For a company known for their great success on iPod and iPhone industrial design, I'm surprised they can't design a decent mouse.
* Airport Routers. The original UFOs were lemons and Apple knew it when they sold them, and didn't do anything about it. The original Time Capsule was a lemon design too, and they didn't do anything until lots of people got pissed off about it. Typic Apple. Sure, the current AirEx has been fantastic, but dang!
* Cinema Displays. I'm an idiot, and I keep buying them - and I'll be buying another in the future I'm sure. However, the majority of Apple Displays I've owned were defective. I had my 22" repaired about 7 times and replaced 3 times, and even the one I finally stuck with was pretty badly defective. My first 23" had a yellow cast in the corner, and my current 23" has 2 lines going down the middle on certain shades of white -sadly both showed this issue RIGHT after the warranty ended.
* iTunes. Seriously, if I took over as CEO my first move would be to publicly apologize for the disaster known as iTunes, fire the people responsible for the quirky, mismatched redesign and the people responsible for the unstable and laggy Windows version.