Of the Macs, the original compacts (128 up to Classic 2 / Color Classic) would be worth a mention. Then their spiritual successor, the iMac G3/4.
Mac Mini G4. Took the cube, made it smaller.
And, without meaning to sound like an Apple fanboy, the Twentieth Anniversary Mac, which effectively previewed the iMac flat panel.
The C64 facelift in C128 style was a nice machine.
I own, and have owned, various consoles. The PS3 slim is reminiscent of the PS2 slim, though the sliding drive cover does feel like it could fail at some point. The Xbox 360 is a bit of an ignorant slab design, though the face panels offer a little in the way of customisation. I'd say the Wii would be the best looking box under the TV if it was in black, and lying horizontally. Compact yet still has the Gamecube ports on the side.
The IBM PC110 was like a shrunken Thinkpad.
The Packard Bell 'corner' desktop from the 90s, solved the problem of huge desktop/monitor combinations on small desks by being designed to be placed in a corner, with the keyboard/mouse to the side. (A common setup back then!).