I've never made two reference sheets in one year so oh my god.
I made a reference to put in my art-trade-book and commission-book for conventions! I noticed literally everybody making mistakes on Nihil's design so..I decided to give it some pointers since I'm very strict on markings and features being correct ^^'

Oh and a little clothing chart, I noticed you mostly will get a lot of nudity in your sketchbook if you don't involve any, which is fine for toony but a little..naked for anthro-anatomy :p