I think more people would be playing Warhammer Online if teenaged inter-species love triangles were allowed in the game.
Here's a typical Warhammer fight scene now:
A Goblin Shaman heals a Witch Elf, the Witch Elf is attacking a Dwarf Rune Priest.
Boring, right? I fell asleep just thinking about it.
Proposed Twihammer fight scene:
A Goblin Shaman is totally conflicted about healing his Witch Elf girlfriend because she is totally conflicted about attacking a Dwarf Rune Priest. The Dwarf Rune Priest now looks like a tall, shirtless, exotic young bad boy who has a sensitive side.
I just made your game 80 trillion dollars, real money. You're welcome.