I like favorites. If you think about it, each person has a favorite for most things. They've lived their whole life and have landed on say a single food or movie as their favorite. I think talking about those things can really give you some insight on a person.

And as a bonus you can get the chance to branch out. If anyone ever says X is my favorite movie and I've never seen it, I'll watch it. If it's someone's favorite it usually has something there worth experiencing.