Aw man, I'm kind of jealous of you. To be able to go back and see Peter Sellers movies for the first time again would be amazing. My dad absolutely loved him, and I can still hear him cackling at his movies growing up. As a kid, they weren't very funny, but as an adult I now get it.
I watched the Pink Pather movies with my dad growing up, and re-watched them with my son a year or two ago. Watching them with him was kinda like watching for the first time.
He was so funny. I need to watch some of his other films.