This might seem like women are a little too hard to please, but it's really not much to ask. Confidence is super sexy when it exists without a side of added cockiness. A massive ego and an attitude indicating that you think you're better than everyone else is not a turn on for anyone. Guys who talk over other people, only want to engage in conversations about themselves, and explain simple concepts to people as though they don't already know are a major pain.
The hot kind of confidence is the one that shows you're very comfortable with who you are. It also means you don't take yourself too seriously and aren't afraid of looking silly or being wrong from time to time. Men with confidence don't need the macho shield that so many women find off putting.