best anime opening/ending?

I really like:

Konosuba, Tomorrow
Baccano, Guns and Roses
Assassination Classroom, BYE BYE Yesterday
Detective Conan, June Bride
Boogiepop Phantom, Mirai Seiki Maruhi Club
Katekyo Hitman Reborn, ALL OF THEM YES ALL OF THEM THEY'RE ALL GREAT
Code Geass, Mosaic Kakera and Shiawase Neiro
D.N Angel, Byakura

I will stop here because I can go on and on and on and on and on and on...