I enjoy, for example, ketchup, or catsup, however you prefer to spell it; but I don’t eat spoonfuls of it by itself, I don’t try to add it to every dish of mine, and I certainly don’t add it to other people’s salads or toast.
While I also enjoy the occasional crossover, I don’t feel a need to add Steampunk to everything, especially in the presence of people who dislike it for whatever reason.
Remember ten to twenty years ago, when fear of the furries turning every topic to themselves far outstripped that actually happening?
Now these days, there’s apparently a term for people changing topics to one’s favourite television program and refusing to let go of it. While I may be grumpy at a few things with obsessive fan bases, or ones which are infamous for harbouring people who take pride in how bothersome they can be, I know that making a valid comparison or asking people if they like what you like isn’t the same as reblogging things with only a GIF and a claim that you’re taking it for yourself, or asking a forum thread about potential game rules changes why there’s been no mention of your favourite web comic.
Persistance is the main issue; instead of being a self-styled missionary, look for other things to like, or ask people what they like; you can find something else to like without having to over-catsup people’s toast.