My favorite series

I recently finished reading Obsidio and Only Human, the final books in the Illuminae Files and Themis Files series, respectively. Both series were great, which got me to thinking about what my all-time favorites are. So I tried to determine that in a somewhat scientific way by going through my Goodreads ratings to determine which series had the highest average ratings across all of the books in the series. There were several (including Illuminae Files and Themis Files) where I rated all of th...