I've seen a number of models that use only a single keyword, so I decided to try it out too. I put 200-something of my own drawings into a folder, tagged them with a single keyword and let it rip.
The end result does a pretty decent job of mimicking my art style.
It works best if you put your desired species in ((brackets)) and also put "bear" in the negative prompt... unless bears are what you are trying to get.