@Lithium I used to get that occasionally due to the way I ran a Naruto theme on MCM sometimes (mostly from one player). Primarily because I tried very hard to be consistent with Naruto's theme. Unlike most anime, that theme has all their dumb anime shit down to Star Trek level science detail, so I just tried to maintain that consistency because I thought it was cool.
That said, I honestly do enjoy some theme coherency, I feel like it creates some limitations to give the world a solid flavor. And when those limitations are broken, it's cool and special. A part of why I'm limiting my MU to four areas of theme inspiration to start, and only veeeery selectively adding anything after those four in a way that doesn't impact the established world too hard.
So yeah, don't be afraid to stick to theme! Also, if anyone knows Yakuza, it's definitely Chet >_>.