A primary variable I think is always just flavor. In that field you can't really win, and I've already been over that. But there are methods to make your content more appealing, even if what you use is not necessarily popular at the moment. One fundamental issue, I think, is the fully anime nature of the check. You may think it diverse, I think it eliminates a portion of the audience. That's far from the only factor as anime and the like is rather popular, but most of those suggestions in your check run similar tones with different skins.

But perhaps a more glaring issue, one that is less abstract and more correctable, is the general structure of your interest check. By no means does one need a perfect presentation to get somewhere, but I find it suffers from a distinct lack of basic proofreading. In a forum context and especially chat context, I couldn't be arsed to proofread beyond checking if I contradicted myself. An interest check has far more room to be done right, and really, it should be done right. It's your pitch to another player. It is the basis of quality upon which you're judged, even if it is not necessarily accurate (I have an intro post elsewhere that has over 40 edits of polish, fuck if I am going to do that to a roleplay post ever in my life). It does not need extensive proofreading, but it could probably use a basic read over. I am lost at the general tone of the post (extremely indecisive rule presentation, abuse of 'normally').

While I appreciate the honesty, being antsy about replies really does not increase your appeal, and if anything is a very bad sign to those reading the post. As something that approaches the borderline standing by itself, being antsy implies you are one of the people who will go 'are you there are you there hey post godammit post' (right or wrong mind you, perhaps you're much more mellow about it) which feeds into an impression of low effort (proofreading) a few quality warning signs (the dominance of OC x canon char in preference is something commonly seen in very fast roleplays that burn out super quick and badly in my experience, and the overall tone raises a small maturity flag) and a conclusion that, based on your last rule, you want a fast roleplay that continues for a long time. I find that a contradiction in terms. Perhaps someone else has achieved it, but I find fast rates and long term to be opposing magnets.

Maybe the above is wrong, and not what you mean to convey at all. I'd believe that. However, flash judgements is the heart of the problem and that will not be 'fixed' (improved, assholes like me will judge anyways after all) without a presentation that is cleaner, more proofread, more structured (you could mention that you like regular posts in the rules and compensate for antsy with expecting regular OOC activity) and, if not more broad in its scope, then perhaps offering something more concrete in terms of plot ideas to really show you've got what it takes. Based on that post, I really don't know. But I'm not the best person to decide at all, as I've gotten quite picky over the years. My interests are diverse, but my [i]interest[/i] is very difficult.

I think you need to consider other people's interest checks at an analytical level - [i]how[/i] they write it, [i]tone[/i], the [i]cohesion[/i] of the structure - to see how to at least spruce things up and see what might appeal. Again, this all might do nothing at all, as people have fickle tastes. All you can really do is analyze yourself if you can (some people can't, oh well) and work on the structure that you can definitely spruce up. If none of that works, consider giving group games a try (I thought 1x1 lasted longer, but honestly, half the time it's the same bloody thing if you have a semi competent group gm with an equivalent okish 1x1 player), writing stories a try (NaNoWriMo is coming up) or enter that fickle domain they call worldbuilding.