Flying machine heartbreak (spoiler)
I like flying machines in oldy timey games, (assassin's creed 2 for eg), so I was sorely dissapointed to have to wait for access to the great plains etc. in order to spend some time being mauled by grizzlys and wolves in my hunt for what I found to be fairly elusive beaver, only to not be able to fly the machine through the gorgeous scenery of this game.
It was a bit funny that the inventor got about 30 feet then nosed dived it, but all in all I feel a bit ripped off.
Flying above this beautifully presented world would have really topped the game off.