That's the problem... those who bash Macs almost always do it in one incoherent and irrelevant sentence. Too bad it's the same thing with PC bashers (witness jadam

j/k)
There are many reasons why macs are good:
1. Good build quality (important for notebooks)
2. Powerbooks are pretty thin and yet have fairly nice features
3. OS X is nice (hey, what other commercial desktop OS has emacs bundled

)