> this is pretty cool. I would love to see a service takes writing samples in your own handwriting and produces a letter that looks like you wrote it.

That would personally be horrifying to me. Imagine, someone can make it look like you said _anything_.

There are services that will take samples and make a ttf font. Here's one: https://www.calligraphr.com/en/

I run handwrite.io, which does exactly this!

Thankster.com can do this as well.