MYSTERIOUS
https://puzzling.stackexchange.com/questions/75882/mysterious-email-message
https://puzzling.stackexchange.com/questions/60558/a-mysterious-benefactor

VISUAL
https://puzzling.stackexchange.com/questions/2258/chaos-and-order-a-visual-puzzle-in-stained-glass
https://puzzling.stackexchange.com/questions/6453/a-well-balanced-puzzle-logic-puzzles-in-visual-disguise
https://puzzling.stackexchange.com/questions/43461/a-simple-visual-puzzle-to-die-for

LOOKING
https://puzzling.stackexchange.com/questions/40989/is-a-married-person-looking-at-an-unmarried-person
https://puzzling.stackexchange.com/questions/59188/guy-who-understands-if-a-diamond-is-genuine-by-just-looking-at-it
https://puzzling.stackexchange.com/questions/60441/odd-looking-circle

POLYNOMIAL
https://puzzling.stackexchange.com/questions/29021/no-its-not-a-polynomial
https://puzzling.stackexchange.com/questions/25922/a-secret-polynomial
https://puzzling.stackexchange.com/questions/38115/polynomial-game-with-devil

PREFIX
https://puzzling.stackexchange.com/questions/78687/my-prefix-is-polish
https://puzzling.stackexchange.com/questions/63698/my-prefix-ends-fast
https://puzzling.stackexchange.com/questions/62349/my-prefix-is-food-my-suffix-is-rude

SENTENCE
https://puzzling.stackexchange.com/questions/6691/growing-anagrams-what-is-the-longest-possible-list-forming-a-sentence
https://puzzling.stackexchange.com/questions/34945/a-rhopalic-sentence-of-at-least-5-words-beginning-with-as-long-word-as-possible
https://puzzling.stackexchange.com/questions/46589/a-single-sentence-puzzle

LOGO
https://puzzling.stackexchange.com/questions/79978/a-missing-symbol-for-this-logo
https://puzzling.stackexchange.com/questions/40529/rebuilding-the-rio-2016-olympics-logo