Kancolle and Type-Moon. Maybe Danganronpa as well, but mostly those two. I'm more on the Fate series side of the fandom, but I do like Kara no Kyoukai and Tsukihime is p cool.
"Overall, I think people tend to reveal their true selves when they step into an avatar. As I said earlier, they probably feel some sense of freedom. But freedom easily gained quickly turns into a false sense of omnipotence."