It should be remembered he produced/wrote a lot more films than he directed, he stopped directing films after Curly Sue (which is his worst film by far) in 1991 which is a shame really. But of the films he did direct, Ferris Bueller, Uncle Buck and (especially) Planes, Trains and Automobiles are especially great - the latter is one of my favourite comedies with Steve Martin and the also sadly missed John Candy on top form. The bit where Steve Martin lets fly with a stream of f-words is hilarious.