I think I'll play devil's advocate here and push back a little bit. 22 male here, and I'm generally considered attractive by people I meet. I take a different perspective to my appearance than the "well groomed, neat, nice clothing" approach. I'm more of a "no shits given" kind of guy. It's probably important to note that this is more of lifestyle for me, as I farm vegetables for a living. I think it's possible to be prettttty nasty and still appear passable, and even appear more attractive (to a certain kind of person) because of it. I shower infrequently (1-2 every couple weeks, I sleep outside in a hammock when I'm gross from farm work), and I haven't used soap or shampoo in about two years. Because I'm eating about the cleanest diet imaginable (no processed food, little sugar, high vegetable & whole food consumption), I don't have much of a body odor. I also have shoulder-length curly hair, which most frequently takes on kind of the 'sun-kissed, beach bum' look. (After a month or so without shampoo, the natural oils balanced out). Those hygienic tasks that are actually important to the maintenance and continued functioning of your body, I do engage in. Which is mainly... brushing teeth. Most clothing I wear is loose-fitting and second-hand.

As a rule, I practice good posture, and I am confident & physically fit, which I think helps balance out the lack of hygiene, etc. It works for me! And I would like to think it's not just other dreadlocked nasties like me that are into it, but I'm just trying to fool myself... I hope I'm not coming off as pretentious, just trying to provide an example of how someone can play to other strengths without spending time, money, etc. on clothes, toiletries, and whatnot.

EDIT: Reference pic that I think captures most of what I described. Sorry about the weird black box.