I liked replaying the opening to MGS5:tPP! Soldiers running around and shooting people, a weird little girl that flew, a human torch that was blasting the soldiers - all while you're barely able to stand up straight! And when the burning guy showed up on his furycorn - holy hell!! Knowing a little more about the assassin made that part more interesting, too.
I played a few hours of MGS5, got through the intro and out into the desert and stopped there. I'm not a huge fan of stealth games right now. I generally have an hour every now and then and I'd rather not spend most of that time sitting in the same spot on a hill with binoculars watching guards walking around bases trying to learn patrol routes.
You don't need to do that! In fact, if you just sneak into places and only take care of the objective, you're going to be hurting for employees back at base. Use your tranq pistol to put some enemies to sleep and balloon them out. You can smack them around a bit to stun them, too. Shoot the rest.
Later, you'll get binoculars that also scan enemies to see if they would make good employees. Then you can be smarter about who to knock out and who to... well... waste.
Of course, you can be a nice snake and avoid killing with some work, but you don't NEED to do that.