One of my first posts (and still in the "Popular Posts" list) is the "Dirty and Cheap" approach to monsters in Pathfinder. The text is atrocious and was followed by a 2nd part and - some years later - a few musing about Type and Role in Pathfinder (and why they shouldn’t be linked).
I'm still not sure if "Dirty and Cheap" monsters deserves a revised post. I'm still using the same approach today, plus a lot of reskinning, although games like 13th Age (specially the awesome 13th Age Bestiary) gave me a lot of food for thought on subject.
However, the point of this post is to remind that there's new product that may do exaclty what I was talking about - The Genius Guide to The Talented Bestiary for Pathfinder RPG. I unfortunately lost the Kickstarter campaign, but I hope to get the PDF as soon as it's availabe to general public. Here's a preview and below are a few pictures from the book.
Oh, and I heard that there may be a 13th Age Bestiary II coming out too!