This is the first stealth game I've ever played where fucking up doesn't make me hit the restart button.
I still tend to reset a lot because I'm a big wuss and like getting that no alert, no death bonus at the end along with uniquely skilled soldiers. I get the feeling that will change though as there are bound to be some missions that absolutely require firefights.
I have yet to go head to head with the Skulls and have been bringing along an RPG on every mission following mission 6 just in case.
EVEN BIGGER ASS SPOILERS:
D-Walker is amazing, I've got a gold-plated AT-ST now this is the best.
Having that must mean you've finished:
Oh my god. This mission was so intense, I snuck in the longer way around the satellite dish, ducking the Hind D and Fulton-ing dudes as I went. Completely dodged the Walker Gears and didn't even try to extract them.
The whole thing culminating in in that huge escape at the end was absolutely incredible and had my heart racing up until the very end with the massive explosion.
Finally, that interrogation of Huey was so intense. I almost felt sore just from watching Kaz do that to Huey's leg.
Where do you find yourself listening to the cassette tapes most? I usually alternate between using them in the ACC and around Mother Base but feel like I could be multitasking more by having them go while on side-ops.