Eharmony helps match members with a extensive personality profile questions you answer when you sign up. If you serious about finding a relationship, this might be the best website for you.
Yahoo Personals has a lot of diverse members and you can chose the way you want to communicate. You have lots of room to tell others about yourself.
Chemistry.com is more for business professionals. It guides you through the process and allows you to meet in person when you feel that your ready. The website also keeps track of your matches and builds on that to customize your searches.
Great site for finding compatible singles. You can search on your own or let the website do it for you. PerfectMatch boasts 30 years of scientific research went into development of their database matching system.
Match.com has millions of members and is one of the largest online dating services. Dr. Phil advice is there with the MindFindBind solution and Match.com has a guarantee that you will find someone within 6 months or get 6 more months free.
EHarmony is annoying to me as you cannot scroll through the site and view them yourself. But some people like it, so to each his own. :)
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