For fun (and no profits!), I built an AI-powered haiku poetry and generative visual art app. It started as a daily puzzle (https://haikudle.ai, previously shown on HN), then evolved into an authoring tool with curated daily haikus (https://HaikuGenius.ai).
To learn more about SEO, digital marketing, and other areas I hadn't explored in much depth yet, I tried bringing it to market with modest success. It's been a fun journey so far, and I’ve documented the first legs here: https://medium.com/@desmat.ca/a-genai-haiku-journey-part-1-a... and https://medium.com/@desmat.ca/a-genai-haiku-journey-part-2-f....
I'm also experimenting with a similar format for limericks (https://limericks.ai) but I haven’t cracked that nut yet.