I WILL draw:
NSFW (up to and including pornographic material)
furries
animals
weapons and armor
simple mechanical parts such as robotic prosthetics
light blood or violence
most genders
most kinks (there are very few things I explicitly won't consider)
I will NOT draw:
Extreme gore or snuff
obscene violence or sexual abuse
Vore
pregnancy (in most cases)
excretory content
complex mechanics.
NSFW artwork depicting minors/lolicon, or characters who are adults in their setting yet appear to be extremely young (such as Elin from TERA).
Regarding fanart commissions:
For NSFW content, the characters involved must be depicted in their canon work as 18+ at some point.
Characters that have no stated canon age but that can be reasonably presumed to be adults (such as holding down a job or living on their own) are perfectly fine.