Well, as a German consumer, I gotta say it's pretty darn great to be able to pinpoint a website to an actual business. It's a good way to judge how legitimate an online shop is before ordering, for example; and if anything goes wrong, I know there is someone I can hold accountable.
As a hobbyist dev you don't need an imprint - unless you're selling software, at which point you're a business and your customers should be able to hold you accountable for it.
You need an imprint for pretty much everything, as I wrote earlier. Even a hobbyist Youtube channel requires one if you're strict with it. It's enough that said thing could have business intent and I want to emphasize the could here. To be completely sure, you'd have to check with a lawyer.
