Eharmony.com, which recently came to the UK from the US, does all the matching for its users, who are unable to browse profiles.
And anyone who's dreamed of getting married in full Klingon formal robes should head to trekpassions.com, a site for die-hard Star Trek fans to seek out like-minded individuals with whom to boldly go where no-one has gone before.
The site actually reaches out to all kinds of sci-fi fans, with special groups set up for fans of the X-Files, Star Wars and Battlestar Galactica among others.
FOR THE UNDEADIF dangling eyeballs and rotting flesh do it for you, should be your first port of call.
Users can specify whether they are looking for a slow-moving, fast-moving or immobile zombie as well as criteria including whether they want someone who is "freshly-turned" or rotten.
Nonetheless, technology is allowing Britain's singletons (15 million of them, around a third online daters) to date smarter.
GPS, social networking sites and smartphones have changed the way we date forever and, thanks to increasingly innovative approaches to online dating, there truly is something, and someone, out there for everyone.
The industry is now said to be worth around 2.5 billion worldwide, with that figure expected to continue to grow, particularly with the introduction of dating apps on smartphones in the past few years.
Every year thousands of people meet through dating sites, including The Scotsman's Perfect Partners ( with members using sites for everything from no-strings hook-ups to finding a life partner.
Profiles list interests, including "chasing injured people" and "staring vacantly" while hobbies might include gnawing, lumbering and groaning.
Like most dating sites, this one includes a disclaimer: "We are not responsible for lost or ingested loved ones.
HAPPY couples sharing a swing, clinking champagne glasses at sunset, walking a golden retriever together. Once considered the pastime of desperate oddballs, the days when online romance carried something of a stigma are long gone.