While thin brows can still be feminine, thick, well-shaped brows are generally viewed as more contemporary and flattering, emphasizing a soft and natural look.
From reading studies on beauty perception, thinner darker brows are considered more attractive to men. Not pencil thin, but thinner than what's in style right. While still retaining a nice shape, of course. Women find the thick, laminated brows trend more attractive becuse it's fashionable.
Thick eyebrows are very attractive because they give a natural-looking appearance to your face. If you have thin eyebrows, you may consider filling them up by using makeup or eyebrow extensions to improve on their appearance. Thick eyebrows are also an indication of youth and healthiness.
The Rounded Brow
 This is one of the most natural types of eyebrow shapes that give off a softer and more approachable vibe on the face. The best part of the curved brow? It is incredibly versatile-allowed to be as thick or thin, bold or soft-and it's just going to be beautiful.
It depends on proportions, OP has a tiny forehead so thinner brows give her a more youthful look since a bigger forehead is a neotenous trait. But if you have big forehead and eyes, thick brows can really balance your face and not detract from your youthfulness.
For females, darker eyebrows are generally rated as more attractive because they are perceived as being more youthful (Jones et al., 2015, Jones et al., 2018; Russell, 2003, 2009).
An oval face is considered one of the best attractive face shapes for women, but unfortunately not for men. Though, for hair cuts it is a good face shape to have, because many look will look good on you. Men with an oval face can pull off different shapes and lengths because the face is well balanced.
Jamie Long, Lead Stylist at HD Brows advises, “Whether you have a warm or cool skin tone, warmer tones such as auburn, golden and bronze can make you appear younger instantly.
Heart-shaped faces are wider at the forehead than at the jaw and can sometimes have a pointed chin, so slightly thicker brows can help balance these features (see Lily).
The smaller the gap between your brows, the slimmer your nose will appear, especially if you apply a contour from the inner edge of your eyebrows down towards your nostrils. On the other hand, wider set brows draw attention to the nose and can make it look broader.
Men tend to prefer thicker brows when looking for a lasting relationship. While guys may not always consciously notice eyebrows, they can definitely find them sexy.
Thick eyebrows personality
 You're logical and decisive, preferring to make decisions based on facts rather than emotions. While you're assertive and forward-thinking, you can get frustrated if things don't go your way.
The shape and thickness of your brows can make your eyes look bigger and finely shaped. If you don't have thick brows you can create an illusion of it by filling them and giving final touches with the comb or a spoolie to make them look fuller.
The oval face shape is frequently cited as the most attractive due to its balanced proportions. Celebrities like Beyoncé and Charlize Theron exemplify this standard, with their facial features often considered ideal.
Diamond. The diamond shaped face is the rarest of face shapes, and is defined by a narrow forehead, wide cheekbones and a narrow chin. Diamond shaped faces are usually narrower at the eye line and jaw line, with high and often dramatic cheekbones.
One type of nose that many people find attractive is called the upturned nose. This nose has a tip that points slightly upwards, and it's generally not too big. It has a certain charm to it that appeals to many. Another nose shape often admired is the straight nose.
The thickness of the brow. should align with the size of your eye. If you have big round eyes, thicker brows are going to look nicer on you. If you have thinner, hooded eyes, thinner brows are going to look better on you.
Thinning brows that go unfilled can contribute to an aged appearance by making your face look less defined. Thicker brows are generally associated with youthfulness, so it's important to pay attention to the fullness of your eyebrows.
The trick to really natural looking brows is blending, blending, blending. Fill in sparse areas where needed then take a spoolie and brush color into brows over and over again. The more blended-in, the more natural-looking.
Generally, people start seeing grey hairs appear around their forties and fifties, but some can experience greying as early as their twenties or thirties. Unfortunately, it is all down to genetics, so there's no way to predict when grey or white eyebrows will appear.
Thickness Matters
 Research in the Clinical, Cosmetic and Investigational Dermatology journal suggests that fuller eyebrows can make individuals look younger. Thicker eyebrows give a more youthful and natural look compared to thin, over-plucked eyebrows, which can age the face and draw attention to wrinkles.
Match your hair color—A general rule of thumb is to match your brow color to your hair color. If you have light hair, go for a shade slightly darker than your hair, and if you have dark hair, choose a shade that's a bit lighter. This creates a harmonious and natural look.