You can easily create Google+ "pages" to solve exactly this problem. They have the added bonus of not requiring "real names", so you could be using a pseudonym or something if you wanted
"Pages" were never (and still aren't) communicated well. The name, for starters, sucks.
They seem to have been created for marketing purposes. Using them to topically divide my posts ... never occurred. Literally, until the past day or so.
You're right, that's something I didn't explored enough, thinking of pages like intended for brands.
I'll play a bit with this to see if it's well integrated enough, since when you click on someone name, you reach post list rather than about section (I would not have people think I don't publish anything, not realizing there are many pages).
I've tried pages, but it's indeed not what I would. I can't find a mean to even just make them appear on my profile, other than making a manual link in "about" page description.