You're missing out. If nothing else, you have to watch North By Northwest, but there are so many great Cary Grant movies, it's hard to pin down a "must watch" list. Everything from Mr Blandings Builds His Dream House through That Touch of Mink and onto Charade or To Catch A Thief and dozens more in between. And my all-time favorite, Father Goose. And I've left out some of his best ones; those are just the ones that spring to mind that weren't necessarily mentioned in the article (there are plenty in there, too).

Seriously, do a search for best Cary Grant movies and go seek some out; even though nobody can agree on the order of said lists, everyone agrees which movies should be on there.