The one thing I noticed when I worked near Jeff and Sanjay and talked to them over coffee is that Jeff is the smart one, but Sanjay is the wise one.

Jeff always had an idea how to make something a bit faster using a clever trick, but Sanjay would respond by coming up with how to express the abstraction in a way that other mortals could comprehend, or just telling Jeff it wasn't a good idea because it would make things more difficult to maintain.

Jeff was also prone to dad jokes, Sanjay's humor was far more subtle. Both were awesome to talk to and one of my proudest moments was when Jeff read a document proposal I wrote ("Google should get involved in Genomics Research and Drug Discovery") and took it seriously.