Comment As far as the free ones go... (Score 2, Interesting) 311
My vote is still for OkCupid. I met a couple really great people on there that I am still friends with today, and I met my current partner of over two years through a volunteer organization one of the aforementioned people I met on OkCupid introduced me to.
I would guess that, like me, most slashdot users would be more interested in the scientific approach that a site like OkCupid takes rather than profile/picture system most sites use.