Two options. Only one choice can be made. You decide.
Ready, set, and go...
SRL or Queen's Wrath
FotL or Iron Banner
Iron Banner or SRL
Hidden ghosts or specific area/planet collectibles/Calcified fragments
Exotic Sword Quest or Exotic Rocket Launcher Quest
Three of coins or Exotic Quests
Iron Banner or Trials of Osiris
Crucible or Raids
Vog and CE or WotF and Kings Falls
Crucible 6v6 4 game types or Crucible 4v4 6 gametypes
Skirmish or Control
PvP Objective gametype or PvP Slayer gametype
Gunsmith PvP quest or Vanguard PvE quest
Reef War or Last City Defense/Offensive (playable pvp or pve)
Faction War mini game or Tower Defense Mini Game
Shooting Range or fly our ships to destination on ground
Guardian Winter events (SRL) or Guardian Fall events (FotL)
Destructable environments or Ship defense destruction
Crota or Oryx
Phogoth or Golgoroth
Vanilla, DB, HoW, and TTK or Vanilla, Iron Lords, and Triumph only
PoE or Queen's Wrath
The Dreadnaught patrol or any planet patrol
Grimoire or Secrets about NPC characters
Tower Factions or Reef factions (House of judgement and Queen's Wrath)
Skolas/Endgame boss alone or all three minds on "The Black Gardan" (which would you rather have in the game)
I'll create another list if this one gets some good responses. Feel free to add or skip or make up your own. Just trying to see peoples opinions out of curiosity...