I didn’t make this rule up, but it’s one I follow: I try not to buy/watch/display/play anything that I would have a hard time explaining or justifying to my significant other or her friends. If my girlfriend comes over and I have a creepy Hentai statue of some anime girl, there are going to be problems. Tanto Cuore might be a great game, I have no idea, but I’m never going to buy it.
Nier walks right up to that line but doesn’t cross it for me. My girlfriend has watched me play it a couple of times, and the first time she saw it she asked me why the kick-ass robot was dressed as a Gothic maid. After that, she just kind of shrugged and we both agreed that it’s just a “Japan thing.”