Favorite Fantasy RPG.
My overall favorite fantasy RPG would be Pathfinder. It has an immersive story and as the Dungeon Master I have the ability to make it as creative as I want. My players have the opportunity to create unique individuals that only they can play because they are completely original with many different forms of customization.
As an example right now I have several players making characters for a campaign that will not start for over a month. In their excitement they are writing character backstories that are many pages in length.