If you were to imagine your perfect RPG, what elements would it have?

Mine would ideally be turn-based combat featuring a bar displaying 'turn order'. Enemies would appear on the field and battles would be "seamless" a la Chrono Trigger. Combat would focus on a rock-paper-scissors mechanic of elemental weakness/ attack types. All characters should be able to participate in battle via real-time swapping in and out. Characters would have abilities unique to them and they would each develop them in different ways. They would all ideally have their own character-building quests based around upgrading said abilities. There would also be a "base-building" mechanic with merchants and the like being recruited throughout the quest. If possible, it would be nice to play the villain. Not an "I will destroy the world" villain, but a character/characters that are doing what they feel is right, but causes the world to rise against them. One of the most interesting parts of Final Fantasy X was when you are branded heretics and the temples and priests rise against you. The normally peaceful towns suddenly became dangerous and unwelcoming, as the once friendly Yevonites were replaced with tough Boss Battles.

What would your guys dream RPG include? :)