Watching through some of the E3 footage atm, I love that the Phantom Pain is pretty much just Peace Walker but done on a much larger scale. I hope they talk more about the buddy system soon though, I'd like to hear more about who/what else other than the 4 buddies they've shown so far you can get. Bosses maybe? (Not sure if Quiet counts as a boss.)
I'm waiting for someone to complain on twitter about Quiet being relegated to buddy status alongside a rideable robot and a dog with an eyepatch.
I'd care about PO if they made it playable on Vita. Sadly Sony and Konami seem disinterested in trying to relicense and authenticate the original MGS and PO, meaning I have to get another PS3 and do that side loading BS to play MGS at all.
Portable Ops was part of a Flash sale, but as soon as i learned I'd just be spending $5 on incompatible software, I just got Hotline Miami instead.