I watched it again the other night, inspired by said commercial. I was struck this time by the firm conviction that Bueller is an utter shit, someone who deserves quite a serious kicking, but as Radiator says... somehow it works, and you end up rooting for him. Possibly, I suspect, because he really is just a righteous dude.
As I'm sure I remarked here before, I first saw this film on a school video recorder (before we had such a miraculous thing), when I was maybe a few years younger than Ferris, and it was like a portal into another world. The MTV astronaut link at the start was the first time I'd ever seen that channel or anything like it - it looked rebellious, it looked good. Ferris had a computer with a modem and a giant synthesiser in his bedroom (which was itself about half the size of our entire house) - our school had exactly one computer for 800 students (ah my beloved Apple IIe), and you can be damn sure it didn't have a modem. He could order stuff in a restaurant. His friend had a car. His younger sister had a car. He could drive. What the hell was this world he lived in? It was a world I wanted.