User blog comment:Faisal Shourov/Why is Highschool DxD so popular?/@comment-1359322-20160324224359/@comment-27002614-20160325041100

I like how they manage keep all the male characters other than MC relevant and interesting (like Azazel, Sirzechs, Vali etc).

But yeah, DxD has a lot of positive things going on. People like it for a reason, it has succesffully avoided many annoying tropes in harem anime.