oh very cool thread !
I like a lot anime openings, and choosing is really difficult but anyway...
This are my favourites .
Eir Aoi "Tsubasa" Arslan Senki Fuujin Ranbu
The Oral cigarettes " Hey kids" Noragami Aragoto.
Oldcodex "Rage on" Free! Iwatobi swim club
Itou Kashitarou " Moonlight Embellissement girl"
oh what a beautiful song !
and of course all the openings of Fullmetal Alchemist