From Destinypedia, the Destiny wiki
Emotes are personalized movements, gestures, and dances used by Guardians. All Guardians begin with four default Emotes: Sit, Dance, Wave, and Point. Of those four, only Point is interchangeable. More Emotes can be acquired from the Eververse Trading Company by spending Silver, by purchasing The Taken King Collector's Edition Digital Content, and by completing the weekly Nightfall Strike.
List of Emotes
These Emotes cannot be swapped out with other Emotes. Sit has two versions, one for each gender. Wave and Dance have six versions each, one for every gender and race combination.
These Emotes can be swapped with other Emotes. All Guardians start with Point by default. Certain Emotes are exclusive to a specific class.
List of Appearances