As far as I can tell, Far Cry 3 wants to be Heart of Darkness: The Video Game, though how well it will actually encapsulate the deeper, darker themes it seems to want to explore is a question yet to be answered. What the game does seem poised to do is to bring together the best loved qualities of the previous two games into an amalgamation that CryTek likely hopes to prove greater than the sum of its parts.
Far Cry 2 was one of those games that a certain population loved deeply, but that just never quite captured me. It was a world I remember feeling oddly lost in, and never quite with a good sense of what I should be doing or wanted to be doing. I've often felt it was just the setting and environment. I didn't seem to want to spend time in the world the game presented to me.
I'm hopeful that a return to the island paradise setting reinvigorates my sense of exploration. I've always loved verticality in games, and when open world games present me as many opportunities to go up as out, I'm far more likely to be engaged.
Also this week, Guardians of Middle-Earth combines Tolkien and MOBA games into DOTA/League of Legends with Hobbit Fever. So, if that's your thing then enjoy.