Quote Originally Posted by Light Mage

It would be even better if your choice of on-screen leader made the conversation with NPC's different depending on who it was!
That happens in the Breath of Fire series. There are characters who will refuse to interact unless the right person is at the head of your party (example: Jean the frog prince in Breath of Fire II). Not only, but walking position influences battle position and the amount of damage given and taken (kinda like front row/back row in Final Fantasy).