I've also re-watched the seasons of Zero no Tsukaima many times, watched Minami-ke a shitload of times, and rewatched Hayate no Gotoku seasons a shitload of times.
Helping wherever I can for those who ask I've made a Discord sever for Doujin Music album releases. Join here I am keen to map dark/creepy/horror/deep meaning Vocaloid songs. Suggest to me any if I missed out any!