Excerpt from this article:
Buried in all that data were some surprising facts about how to optimize your dating profile. If you’re a gay man, pose outdoors—48 percent of the profile pics of the most popular gay men on OkCupid were snapped outside. (It was 80 percent in Atlanta!) Selfies are acceptable for women (45 percent of top-ranking straight women used them, as did 4 percent of lesbians), but not so much for men. Enroll in a yoga class and learn to surf—they’re the most popular activities for men and women alike, so either desirable singles are super mellow or it’s aspirational, and everyone wants to be mellow. Mentioning cats is fine, but mention “my cats” and you’re a weirdo.