The way I see it, Lemmy and the Fediverse as a whole is a big step back to the golden age of the internet before social media became the cancer that it is today and the internet wasn't controlled by a few big corporations. A big part of that, to me at least, is that you could customize your accounts, home pages, profiles, and so much more. I think Lemmy could greatly benefit from a more expansive profile that lets you customize color, font, design, play audio, and other things like that. I think optimizing the site and adding in more essential features should come before anything like this, but I think it would really enhance the overall experience!