Your question is a simple one but very difficult to answer because we have no idea what you look like, what you like & dislike, what your taste in women are, and many other factors.
The reality is (and data proves it) you're better off meeting people either through friends, family or face to face such as bars, or any public place. 70% of couples meet through introduction. Dating sites is 0.3%.
Dating sites were invented with one purpose and one purpose only: to get your money and personal info so they can sell the latter to third parties.
Dating sites will tend to attract a certain demographic and don't necessarily represent the true demographics in your surrounding.
Did I get laid from a dating site? Yes but I would not rely on dating sites for sex. Did I meet hot women from dating sites? Yes...but, that's me. What works for one person might not work for another.
What makes one woman like another man more than another? Why is someone attracted to one person or another? Well, it's complicated and a matter of taste and many other factors.
I say, go after the women that show interest in you. If they like you and want to jump your bones, well, they'll fuck you 'til the cows come home. Simple as that. I've never had to ask women for sex. They offered it.
I wish you the best and hope you meet all the women you desire. Overall, in the end, you really only need one to love you.
I've tried all the popular free ones, and for all my travail all I got was a kiss on the cheek from the only woman who agreed to meet in person. There were a couple others whom I corresponded with over a few weeks, but as it turned out they were just looking for attention.
In fact, most of the responses I got were from guys (even though I said I'm straight), and they were very blunt about what they wanted to do with me. I seriously wish I was gay, so I could be a total manwhore without going through all the bs.
So I want to know if any straight guys out there have actually had some success with these sites? What's your secret? Money? Calvin Klein looks? A 12 inch "personality?"