It's only pretentious to people who don't like taking advice, considering you're not chasing anyone around to cram it down their throats, pretty sure it's not pretentious. I love this cause I absolutely suck at drawing and you make it seem simple.
I've got this art book series by Tadashi Ozawa (apparently a big name in the anime industry) that's all about designing characters. Volume 2 of said series talks about expressing emotions. This sort of reads like a summary of the important points of the first half of Volume 2. I'll let you decide how to take that.