Anime is known as a "nerdy" thing to watch, much like playing video-games is known as "nerdy". Since the people on this site like to play video-games despite the social stigma that still exists, it stands to reason that they would be open to enjoying anime as well. Of course the reason they actually watch it is that they enjoy it, just like anything else, but the reason you find many people on a gamer's site enjoying it is that most gamers have already realised that things society looks down upon can still be good.
This site's acceptance of (or obsession with?) My Little Pony is an obvious example of this.
This site's acceptance of (or obsession with?) My Little Pony is an obvious example of this.