I kinda like them all (except the first one really) but I dont understand some decision you made.
the negro; somehow the gradient works, pretty wel even, but I wonder how it will look without it. Also I dont get the eyelashes. I did read your comment on "effeminate features" but I dont 'get it' it makes it look weird, then again maybe thats your goal. also the head shade seems off.
the lesbo; pretty nice, but I dont understand why you would chose to keep the lashes that are beyond the hair. It sometimes works but this case it doesnt imo. I would remove it. Also the underlining of the eyes are missing and is a bit blurry. it doesnt really fit as well. there are 2 white horizontal lines in the eyes, why? The earring looks like its stuck to her neck, thats because of the shading you did. and again the head shading is not correct, this is the most noticeable part.
the naked male(?); no shades this time, only some highlights which is fine. This time the absurdity of the eyes, making it look like a shemale, is fun and suits the whole picture. I would only comment a bit on the body hair, I would shorten it a bit or remove it all together.
Again I really like the pics, but there are some small issues which are easily corrected I think.