I’ve been in absentia almost as soon as I started this site (khpilcher.com) because I immediately ran into problems making the site match my vision for it: sections on poetry/prose, general essays, religion and philosophy, and a chattier blog that meanders on about beer, writing, friends, music, photography, and anything else that might once have gone on Facebook (may it crash in flames or at least be broken apart as the monopoly that it is).
This is not possible with WordPress.com and a survey of other sites seems to indicate that it can’t be done with WordPress.org either. I’m having to rethink what I will do. My prime purpose for this site is to publish my writing and secondarily, to share my thoughts on objective truth versus subjective desires. A jumbled mess of all the above categories would indeed live up the name of the site: it would be a roomful of voices vying for attention with no focus. This seems undesirable. I’ve got one work-around in mind, but it would be cumbersome and additionally would raise the question, “Why are you paying for a domain and premium services?”
Until that solution is enacted, I’ll drop one or two things in here, but not much. Until then…
all the voices in my head 
Aye Laddie, there be dragons where ye wish to go. Just write first and let the posts sort themselves out later as fortune and chance may dictate. I realize that goes against all you cherish (order and a proper schema) but sometimes you may discover the beauty of an unexpected gem hidden in all the chaos.
I think you have made an erroneous assumption. I do have things written, decades worth. I have more things half-written in my head. I don’t want this all jumbled together in a typical blog fashion. As on your site, where all posts adhere to an overall theme, I want my posts in one ‘area’ to line up with one another.