OS-tan fallacy

OS-tan fallacy is a kind of fallacy that happens when you assume an OS to resememble its OS-tan.

Example

Do you see this picture? Objectively, you would assume NetBSD to be the best OS, closely followed by DragonflyBSD, then FreeBSD, and then OpenBSD. However, NetBSD is a pain in the ass to do anything with and has fewer reedemable features than OpenBSD, even though the cuteness and attractiveness of the OS-tans would have indicated otherwise.