Before I got married, I never had any luck with them. Yahoo personals and Match had nothing but dirt-bags looking for one night stands. I joined eHarmony once. That was a joke. After completing their questionnaire, I got a reply basically saying that I wasn't Stepford wife material...which is what they're looking for.

However, keep in mind that this was all before I found out I had Aspergers, which attributed to much of my dating woes in the first place. I don't know how to pick em, apparently.