This explains so much about so many.

Is it a Sherlock Holmesian quality that lets human observers better interact with others? Does the ability to understand friends, colleagues, and lovers depend on the ability to read not just words and body language, but subtle clues provided by even the faintest of facial expressions? The best poker players in the world would say yes. But Sherlock's specialty was not the face, but on inanimate objects and intricate concepts.

Jaideep was renowned for this ability, and Daniel's shifty eyes may have resulted from a failure to read others. The article says shy people confuse angry and neutral faces, implying an ease at reading happy ones. Check it out:

TIME.com - Secrets of the Shy: "'The capacity to interpret faces is one of the most important prerequisites for balanced relationships,'"