As per request (thanks, singingrabbitskull!), I did a half-tutorial, half-sporadic notes on how I generally render basic expressions.
There’s already a lot of cool tutorials that exist on how to do expressions, so I tried to just look at a lot of really minor details that I’ve used but haven’t seen commonly passed down.
required disclaimer: this is just how I go about it, feel free to ignore bits, steal bits, do whatever you want with them. Hope this helps, and if you have any questions scream at my inbox!
Palidoozy is an awesome person with great art and a comic. This tutorial just made her even more awesome.