Interest checks are a way to boost your roleplay's "production value." I can understand why people are hesitant to spend hours learning how to code, format, and pick/make appropriate banners for their interest checks, but I think it's worth it. When I see a well made interest check, I know the host put a lot of effort into it and has faith in their idea. Otherwise, you end up blending into a sea of one paragraph interest checks that are essentially "So I'm going to do a sci-fi/fantasy/Dragon age/Danganronpa/Lonely House Wives/etc RP. Any takers?"

Bonus points if the title is "[insert genre or fandom here] anyone?"