You actually can do this: "I think it would be really cool if you could use the header from the bio page, for the rest of the site as well - then I think it would be less anonymous, e.g.:"

In "Settings," there is a field called "short bio sentence." This bio sentence will show up next to your name on every post.

I'm still playing around with different home page variations. I will consider your request (or give people more options for their homepage). I'll let you know.