I had to play a few hours of Nier today to get the point where I could talk about its book-like interface system for the dissertation. And I had to play to that point because Nier's endgame (spoiler, I guess?) doesn't really leave things in a state where doing that is possible.
What I found is that Nier is a wonderfully complex game (albeit somewhat graphically low for a mid to late Xbox 360 game), one whose eventual story is set up right from the start, and design choices that contribute to the overall aesthetic in a meaningful way all build on each other. It's an unusually rich, creative game for a JRPG low budget (for AAA, anyway) game.
I never want to play it again.
I felt the same way going back to Ni No Kuni (which is much more diminishing returns than Nier) for its dissertation section; there's a point in lengthy games where enthusiasm is displaced by entropy, and trying to research the game at the same time only makes it worse. Nier's a wonderful game, and I could (and have) written pages and pages extolling its virtues, but I really, really don't want to subject myself to having to go through it again. Ah well; I'm an hour or two in and at the shrine where Weiss becomes a party member, so the end's in sight.