Post your favorite easter egg along with a description why, I'll start with one of mine
>In-game reference to Marathon, BOBs are Born On Board npcs in game that the AI encourages players to save any and all they come across
>On the other hand Bungie, the deveolpers of Marathon, encourage the player to kill any BOBs they come across through secret terminals in-game Marathon
>Fast forward to Halo Reach and there are secret golden enemies named "Elite Light Vehicle" commonly referred to as BOBs
>when killed, the player will recieve an after-action report of the enemy being named "Elite Light Vehicle" however upon further investigation at Bungie.net this was years ago, before Destiny the player would recieve a medal on their linked Bungie.net account of a medal named "Seek and Destroy" with a description "Wipe them out…" a nod to Bungie's Marathon and the BOBs they coaxed players to destroy.