There’s a whole side of anime fandom dedicated to pairing their favorite characters together in romantic relationships, be it a male harem lead with one of his five adoring female friends, or two volleyball players who can’t stand each other (I’m talking about you, Haikyu!!). The pairing of two male characters is considered the realm of fujoshi, and series creators aren’t ignorant of their female fan’s hobbies, sometimes playing up subtext to increase a series’ popularity. The poll did have a higher turn out of female voters (66% overall).
Charapedia asked 10,000 fans what their favorite same-sex pairings are and got a lot of interesting results. While these couples aren’t always canon, they’ve accumulated their fair share of admirers.