I am probably the only one out there that absolutely loves I.Q. but that is okay with me. Walter Matthau's character Einstein is what really does it for me. He is just so adorable. And the other 3 old men aren't too bad themselves. Their mischievousness makes me laugh and they play off each other so well. I can only hope I will have that much fun when I am an old and decrepit woman.
By the way, Watler Mattheau is in another classic movie I love -