There are a lot of things that a woman find in a man attractive. Women are attracted to dominance, social status, confidence, ruggedness, height, a "strong" face, broad shoulders, muscles, body hair, large hands and feet, etc.
Social status is big for women. Women are also attracted to men who play "hard-to-get." And there are yet other features which women are attracted to. Women are attracted to men who are dominant. They are attracted to men who are leaders. They are attracted to men who are the "center of the attention."
Do you know why so many women are attracted to doctors, lawyers, businessmen, and cops? Because they have "authority." People look up to them, pay attention to them, listen to them, and learn from them. They are very attractive to women.
Fame is also attractive to women. Famous people such as actors, singers, and athletes are very attractive to women. Do you know why? Because fame is a sign of status. Imagine an actor who is in a movie. People watch the movie. People pay attention to the actor. It's like the actor being the "center of attention." Women are attracted to celebrities because they receive a lot of attention from people. It's a sign of authority.
I'm not saying that a man who tries too hard to *seek* attention is attractive. That's not. What I'm saying is the men who *receive* a lot of attention from others will be attractive.
Voice is a big thing that a woman will notice. Do you wonder why do those male singers get all the women? Do you wonder why a lot of women scream and cheer at concerts? Why do so many women have crushes on famous singers? Well, one factor is that those men have an attractive voice. Women are attracted to that. It's big. A deep, confident, and resonating voice is very attractive to women. That alone can make an average man very attractive to women.
But a lot of male singers have high-pitched, whiny voices. Why do they still attract a lot of women? Let's look at the positives. They're already famous, so their fame in itself will attract a lot of women. Besides fame, those men's voices are confident and resonating. They know how to tune the timing of their words, to make their voice sound confident. They sing loudly, which is also a sign of confidence. They use their diaphragm to make their voice resonate. A resonating voice is yet another sign of confidence.
Another thing which is attractive to male singers is "pre-selection." Pre-selection is a theory that a male will become more attractive if other women are also attracted to him. Famous male singers usually have millions of women going crazy for them, and that, in itself, would make them even more attractive to those women. And do you know why a lot of women are attracted to "taken" or "married" men? One of the reasons that those men are pre-selected by their girlfriends / wives.
There are other features which women find attractive. They are attracted to risk-taking men. Men who risk their lives are very attractive to women. A lot of women are attracted to firefighters, because they are risk-taking. Similarly, women are attracted to rugged, sporty men. And women are attracted to rich men, and men who dress like rich men. (i.e. Don't dress like a bum. Wear clothes which are tailored, clean, ironed, and fashionable.)
Body odor is huge. Pheromones are huge. The major histocompatibility complex (MHC) is huge factor in sex appeal, as well.
 There's a whole community out there about men wearing commercial pheromone colognes to attract women. (www.pheromonetalk.com) Those commercial pheromone colognes seem to work for men, though there isn't solid evidence. It's based on their grossly inaccurate observations. (i.e. "a woman looked at me; she must be attracted to me", "a woman smiled at me, she must be attracted to me", or "a woman chatted with me; she must be attracted to me." - not to mention placebo effects)