At first I wasn't sure I liked this one, but going back through to select the initial posts it's grown on me. I think I'd just gotten tired of looking at it for a bit.
In any case, just like DarkfireStyle26 I built skin tone, goblin girls, and shortstacks into the model.
'tanned' will give you girls with warm, light brown skin
'dark skin' will give you milk chocolate girls
'very dark skin' will give you dark chocolate girls
'goblin girl, green skin' will give you goblin girls (I usually tag fully 'goblin girl, green skin, spotted skin, pointy ears, shortstack')
'shortstack' will give you a squished down girls.
The shortstack concept leaks a little bit and I'll sometimes get shortstack or semi-shortstack girls unprompted in my runs. If I ever care to make a version 2 I'll try to correct that. For now if it becomes a problem throw it in the negative tags.
The default male should be a light-skinned male. In base models I've found often times if you tag a skin tone with couples the man will 'steal' the skin tone and leave the female white. I've made an effort to correct that, though here it isn't quite as consistent as in my previous model. If you want a 'dark-skinned male' add that to your positive tags

