Every editor is different. Personally, I enjoy stories with strong characterization. I want to believe your characters are real people. How do you do this? By being specific. Use specific details. For example, don't write 'cookie,' write 'homemade chocolate chip cookie,' or whatever. Also, use metaphors and similes that are specific to your character. A witch would have much different metaphors and similes than a scientist. Often, you want to give the specific subjective thoughts and feelings of characters. Show me what's inside their head.
Furthermore, generally, the protagonist should be special in some way. Show me this specialness, and then use it in an integral way in the story. For example, I just read a story in which the protagonist is a clock-maker. The climax and resolution of the story should thus involve clock-making. Perhaps your protag is unusually compassionate or brave or whatever. The point is the story resolution should hinge on whatever this uniqueness is.
Consider sending us a story with some unique specific characterizations!
Don't forget the submission deadline for the fabulous February 2018 issue is right around the corner: January 15, 2018! Good luck!