This dating service has been going strong for nearly twenty years, and as such it has probably got one of the largest number of profiles on the Web.
They boast of 7.000,000 members with more joining weekly. It has been made a little easier to navigate by the fact that the database has been split down into geographical sites, with 80 local communities. If you live within commuting distance of these they organise events going on. Worth a look at those if nothing else.
However for me the site was not very user friendly and slow to download, it has some good features, such as you can find out how many times your photo has been looked at. In general I found the site a bit hard going