eHarmony.com is one of the three most popular dating sites today. e-Harmony was founded by Neil Clark Warren PhD, with the idea that dating could be made more successful by applying scientific interpersonal principles. e-Harmony’s patented 29 Dimensions of Compability personality test helps counselors at e-Harmony make optimimum matches for their clients. It should be noted that this site is primarily oriented toward people seeking serious relationships that could lead toward marriage. If this is not what you are looking for, this might not be the best site for you.