Xiaolin Style Eye Tutorial

A request from tumblr. I've had multiple people ask me for help and advice on Xiaolin style eyes, so here's a tutorial for the variations in each series. The bottom section is a bit of extra info for those who are a bit more advanced about highlight placement, as well as knowing when to change the highlight position.
Everything here is based on observation of the animation and artwork, or gleaned from my own experiences, and is by no means an 'official style guide' for others to adhere to.

Xiaolin Showdown©Time Warner and ActionFliks Media
Xiaolin Chronicles©ActionFliks Media and Genao
Artwork © CharactersByChaos