I really loved OkCupid back before they sold out. They would share a lot of interesting data on their blog posts, and seemed genuinely interested in making successful matchups based on how your profile was presented to others. It was fun to be on there and didn’t feel like you were just being presented for “dateable” you were if you didn’t want to be.
I also met my wife on OkCupid, but that was just before the site really took a nosedive. Pretty annoyed they deleted my account without warning, so the first message she ever sent me is gone forever.