Macs may not have viruses, but (*shock*) the two macs that I spent a lot of time on (one in the late 90s and one in the 05-07 range) crashed more than my PCs of those eras did. Apple has done some wonderful things to make things easier for folks (if you had told me 10 years ago that my mom would be making home videos on a computer, I would have had you committed to an institution for the insane), but I don't buy the myth that they're worry-free.
When they moved to a un*x based OS, I switched.
I wouldn't use my laptop they way I used my un*x boxes which were only booted for kernel updates, but I have never had a problem with my laptops.
And hardware wise, especially with the new chasis, they are physically tough. I put my hardware through grinder, a reason why I can't have a toy like an Android or iPhone as a phone.
Had a white iBook. It was dropped, crossed oceans, was strapped to my back on 45 minutes bike commutes, dropped, used a impromptu table tap, spilled on, burnt (yes, burnt) and never died.
Gave it away to someone who had nothing after having it for five years and was upgrading to the aluminum iBook.