"The absence of navigation buttons (Home / End / PgUp / PgDn / and most importantly DEL) was the what drove me back to the PC world. Much as I admire both Apple hardware and OS X, the absence of those buttons caused a serious decrease in my productivity."
To be franck, when I switched to a Macbook pro, even if a number of things I had grown acustomed to, had to be done differently, it really was short learning for me.
The 1/2/3 fingers stuff on the Mac pad is really priceless and replaced the totally insane abundance of keys of every PC laptop I've seen, including Home/End/PgUp/PgDn. DEL is not really usefull when you have backdel.
That's when I understood at which point so many keys (WIFI on/off, geez and so many others) have cluttered the PC laptops.