I've always been hesitant about MGSV being a continuation of Peace Walker's gameplay mechanics. I'm a huge MGS fan, I froth at the mouth with every tiny snippet of new information, but I just don't like Peace Walker. I tried to play it on the PSP when it came out, couldn't handle the awful controls, but when the HD Collection came out I finished it. I got the true ending after about 17 hours, stopped playing it and never went back; it's just not what I want out of Metal Gear. I like sneaking and exploring and playing with crazy weapons and gadgets, fighting wildly creative bosses, toying with enemies and calling my buddies back at the base for ridiculous conversations about Dracula and poop monsters. There's none of that in Peace Walker, and unfortunately the things people seem to love about the game (co-op, base-building, endless side missions in the same handful of tiny levels) aren't things I'm interested in. I did actually get kind of interested in the base-building at the start, but when I realised all it entailed was farming B-rank R&D guys to infinity to make my numbers go up to unlock more powerful versions of the same weapons to fight more powerful versions of the same bosses, I was out.
That said, I'm practically beside myself about doing the same sort of stuff in MGSV. The thought of loading up a certain side mission a dozen times to Fulton one particular soldier out over and over didn't interest me at all, but losing myself in that open world and stumbling across hints about a scientific base out there that I have to find and infiltrate sounds incredible. PW's base-building amounted to increasing the size of a picture of Mother Base that you never got to visit; no thanks. MGSV's base building looks like you're actually building a base, one that you get to visit and walk around on, go and chat with Ocelot, actually train your own army like motherfucking BIG BOSS! Those previews talked about Fulton-ing goats, then going back to base and actually interacting with the goats! I'm going to turn Mother Base into a goddamn zoo.
I still have my worries - that they aren't going to bring the Codec back (tapes are not an adequate replacement, and unfortunately Ground Zeroes hid a lot of Codec-type tips and information in loading screens that you never see because it's an open-world game), that they might screw up the bossfights again, that they might hide all the coolest weapons and gadgets behind a hundred hours of farming and grinding, etc - but at this point my feelings are pretty much overwhelmingly positive. This game sounds absolutely incredible.