Wait for new exotics to come out
Wait for new quests for exotics to come out
Wait a Week to get a new calcified fragment
Wait for Hard-Mode King's Fall to be released
Wait for Challenge mode and actual guaranteed value weapons to drop
Wait for old exotics to return
Wait for new content and events
Wait to get to max level
Wait another week to get each challenge mode calcified fragment
Wait to gain rep with Banshee.
Wait to get your weapons from Banshee
Wait to get the next step in a quest
Wait for grimmoire to update
Wait for a certain mission to come up so you can get a specific exotic
Wait for Reset for another part of a mission to unlock
In short what else do we have to wait for?