Any week we get 10+ icons you will be asked to vote for a special category. Axel & Kei designate the category based on the most fair choice for all the icons submitted (so if it's a mostly textless turnout it won't be best typography!) Here is a glossary of what each category is looking for:

Best Color: Choose the icon that has the best coloring to you.
Best Crop: Choose the icon that has the most innovative and/or appropriate crop.
Best Typography: Choose the icon in which the text looks the best with the entire composition; has nothing to do with what the text actually says.
Best Adaptation: Choose the icon that best represents either the lyrical or word/challenge theme.
Best Composition: Choose the icon that has the best overall look, taking color, text (if applicable), and crop into account.
Most Emotional: Choose the icon in which the character shows the most emotion (can be any emotion).
Most Creative: Choose the icon in which the maker was most imaginative and did something that was unexpected, but still works.
Best Caption: Not to be confused with best typography, choose the icon in which the words in the caption work best with the image.