He acts without thinking and with bad judgment. - Jef Raskin

Imagine if every Thursday your shoes exploded if you tied them the usual way. This happens to us all the time with computers, and nobody thinks of complaining.

Once the product's task is known, design the interface first; then implement to the interface design.

Now there is little difference, except packaging, between a Mac and a Windows machine. Not no difference, but at home we have — along with six Macs (one for everybody plus my travelling iBook) — three PCs and one Linux box, and I can move from one to the other without having to think about it much. What used to be a night-and-day difference in usability has become a small increment in Apple's favor (or favour for you Brits).