My favorite little improv by him was when he felt the need to talk in french about his hair cutting machine and then say "That's French for...". It was cuter than I made it sound.
Oh, or when he was dancing to You Two with the kids and said something along the lines of "I'm sure every family does this." Aww...so cute
"Nothing's lost forever. In this world, there is a kind of painful progress. Longing for what we've left behind, and dreaming ahead." -Tony Kushner's Angels in America