New research from the University of York in England correlates facial features with our first impressions of people. They specifically looked at approachability, attractiveness, and dominance as traits.
To be considered approachable, pay attention to your mouth. A big smile and full lips will make you seem easy to talk to. To give your mouth more aesthetic appeal, pay attention to dental hygiene, having clean white teeth, and minimizing the appearance of fine lines around your mouth ("smoker's lines" or "straw-drinking lines") with a retinoid cream and injectable filler.
To be considered attractive, focus on your eyes. Large, wide-set eyes are considered youthful and good-looking. Maximize your eyes with mascara, eye-liner, and good skin care. If you have droopy tired looking eyes, consider an injectable filler for your tear troughs or a surgical eye lift. If crows feet or furrows between your brows are detracting from your eyes, consider Botox for these problem areas.
To be considered dominant, eyebrow height, cheekbones, and masculine features are most important. A strong, wide-set face, with low thick eyebrows, and a broad jaw line are key features here. Stubble was also correlated with dominance.