I've suggested this before but I would love something similar to Guild Wars 2 where you answer a couple questions about your character at the beginning and that determines some personal quests you have to go on. Even if it were something as simple as "What is your goal in life?" and you could choose treasure, fame, power, helping people, etc. and that would give you a personal mission that unfolds during the game. But agreed, unless they've already planned on implementing that, it's probably a long shot at this point.