In my opinion. the thing that elevates open world games above other genres and, in turn, some open world games above their brethren, are the little details, those immersive emergent moments and things that could so easily be overlooked or ignored altogether, but add life, a sense of realism and unpredictability to the world
Like how in GTA 4, your radio would buzz with static if you made a phone call from inside your car or how the NPCs would take out umbrellas and cover their heads with newspapers when it rained. Or in RDR, when an eagle would swoop down and snatch that rabbit you were about to shoot or how headshots showed the actual entrance and exit wounds. Those types of details, that bring the world alive
So now we have Far Cry 3 and already I've read about some incredible, cool little details and moments. One post mentioned how vultures would descend on a recently killed animal. Another said how enemies would verbally react to wildlife, yelling "Tiger!!" as a tiger emerged from the jungle and swept through the camp
Any other details or emergent moments that you've read about or have seen if you already have the game?