Got a Question about Brand Pages Authority I Can't Answer

So a reader on my article "Seven Ways Writers Can Build Online Authority with Google+" left this comment: 

Do you think I should always operate as myself, not as my website’s page, to build my author rank? But, if I have multiple interests and website what happens? I can’t be narrowed. For example, my website is about photography, but with my personal account I am taking part in a couple of communities about startups and digital nomads. So I would think that connecting and interacting as a page should be better. Will the “authority” of brand pages contribute the authority of the author?

It's that last question I don't know how to answer. Got any advice? 

Here's the article if you want context:
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