And why?

Choice. The game has a ton of options as to how you want to deal (or not deal) with situations. MGS3 was the last mainline game to facilitate this kind gameplay, and it expands on it exponentially. Want to Fulton anybody and everybody in an outpost without them knowing you're there? Go right ahead. Want to stage a helicopter assault and massacre everything that moves? More power to you. Want to slip in and out of a base to rescue a prisoner with no one none the wiser? Do so. Want to strap C4 to a mook's back and detonate it when he's with his buddies? Great, have fun with that You're allowed this huge amount of freedom with how you choose to play (as Kaz frequently reminds you) and the game respects the player's intelligence by putting you in this sandbox and not holding your hand throughout the experience, allowing you to succeed or fail on your own terms. It's refreshing to see a game with this kind of gameplay philosophy especially in this day and age of linear, scripted-encounter heavy games that coddle the player at every turn. I like the dialed-back approach to storytelling. The player's actions and experience, for all intents and purposes, is the story this time around, and I like that new approach. MGS4 went way too far with the amount of cutscenes that constantly interrupted ganeplay, and MGSV feels very much like a reaction the negative feedback MGS4 received in that regard (come to think of it, the odd-numbered games always feel like a reaction to the even-numbered games). Although I do miss the Codec and the humorous conversations Snake would have with his support team, the cassette tapes are a good replacement that serve the Codec's function well without pausing and interrupting the game. As for Kiefer Sutherland, I think he does an admirable job as Big Boss. Quite frankly, I can't imagine David Hayter delivering some of the lines, like "When that time comes, I'll pull the trigger" as well as Kiefer did. I particularly like his more subdued performance as BB as opposed to the borderline parody that Hayter did in Peace Walker. Metal Gear is known for its attention to the little details, and The Phantom Pain is no exception. Like when you deploy into an area, you can reload your weapons right away because of the round in the chamber. Tranquilize a guard, and if he falls into a pool of water be quick to get him out (or not) otherwise he'll drown. Take a beating and receive serious injuries in the world and next time you're in the AAC, Big Boss will be getting a blood transfusion. Hide in a port-a-potty and play the sound of soldier using the toilet through your iDroid's speakers and guards will leave you alone.