Our other Editors' Choice, Tinder, is geared more toward the hookup scene, and prioritizes photos during signup.
An extensive CAPTCHA sequence similar to, but not as extensive as, the one you'll go through signing up for Ok Cupid follows.
You also have the option to send the message as Priority, which floats you to the top of the receiver's inbox.
In the marital status section, it also offered a "not single/not looking" option, which seems odd for a dating app.
Strangely, in a later question, that status doesn't preclude you from having to answer a question about who you want to date.
Unfortunately, I found that even when I wasn't being terribly picky, my search would net a No Results Found response.
The search function can also be a bit laggy; most times that I tried to refine my search, it took a few extra seconds to run, whereas this function was instantaneous in my testing of most other apps.
As with any free dating app, though, you run the chance of encountering casual users who want to dabble without committing to a paying plan.