Attractive qualities aren't an exact science. What one person finds attractive, another may not. There are also things that society says are the standard for attractiveness, but those also can't be blanketed on everyone.
1. TaisDoubt says:
Sharp cheekbones, Angelina Joulie style.
2. Careful_Hearing6304 says:
Very muscular men. It's hot when they look fit and healthy but after a certain point it looks ridiculous and unnatural.
3. MoneyPowerNexis says:
Loud chirping. It is a common mating strategy for many animals, especially insects and birds, but it can be unpleasant sometimes.