Eh, personally, I think the earlier days of Highschool DxD were better, compared to the later seasons or the story beyond that if you have read the novels. The idea behind it is pretty awesome, and the build-up of Angels, Fallen Angels and Devils. Throw some Dragons and Holy Relics and Gods of different Pantheons in it and you got yourself a real cool story. Yeah, the tiddies are nice too, I won't deny that. But sometimes, it's just too much IMO, especially later on. Sometimes it's just unnecessary to sexualize literally everything and ruins the actual story. I get that it's a harem anime about exactly that, but still. The later stuff in the novels gets weirder too, I'll put that in a spoiler. [spoiler]For example when Koneko gets into her "mating season", a new ability of Issei to talk to others through girl's breasts, and Issei's own peerage and house where it basically just develops into a giant hotel for every girl ever appearing and I swear why the hell is he still a virgin after literally everyone wants to nail him?![/spoiler]