Boys like edgy things like memes about dark humor, horror video games, and cartoons that don't have anything "girly". In terms of music, they like rock bands and rappers.
Girls meanwhile like memes about cute/wholesome things, video games and cartoons with female audiences, and female singers/rappers. Sometimes they make memes about boy bands, too. Although I barely see anything like that get popular (because of course, boys on the website hate "girly" things).