I also have a lot of fun flipping through my layers to see my panels evolve from 'fever doodle' to 'art'
The dialogue often changes a bit between conception and completion, but the first part of my process is always writing (or re-writing) my script for the episode.
Second part is the lovely rough sketch. The level of cleanness in lines, anatomy, and detail in this layer depends on how tired I am at the time and how much work I want to shove off for me to deal with later. :')
Third is lineart, where I have to deal with my prior laziness, fix wonky proportions, and sometimes change characters' poses entirely. I lower the opacity of the sketch layer and draw over it.
Fourth, I color in silhouettes to make it easier for me to select them and re-color them with the correct palette later.
Fifth, I re-color and tweak brightness, contrast, and saturation until it looks how I want it to.
Sixth is several layers of shading and light. I do this by duplicating my color layer and creating overlapping darker and lighter copies, then erasing sections where I want light/shadow.
I usually add in speechbubbles, action lines, and blur last, as well as finishing touches, 'shinies' for reflective surfaces, and glow for spirits or magic eyes. Might go back and clean up lines and colors a bit at this point, or add texture and color gradients to the backdrop between panels.
Straightforward, terribly time-consuming process.