Soldato
It's epic. First half an hour, I thought it was a bit rubbish but I think I'm on day 5 or so now and it gets better each day. I have been loving all the exploration you can do although I am irked that I missed a few things and they are literally miles away from the start point of each map. It will take some serious effort for me to go and try and find them.
As a completionist, this kills me too. I've been slowly taking my time in this game playing it here and there since release. I finally just got to a pivotal point in the story and I agree, it's a bit slow to start but it gets amazing around midway.