Mine are "Soul Eater", "Black Butler", "Attack on Titan", or Both "Noragami" opinings.
Mine are 'Attack on Titan', and 'Captain Tsubasa 2018'
Ignoring animation entirely, original Pokemon for the theme song: "I've got to be the very best, Like no one ever was!" So epic.
Mine's definitely either 'Unravel' from Tokyo Ghoul, or the newest of the Attack on Titan openings, 'Shoukei to Shikabane no Michi'!
I finished Kill la kill and it"s second op is my favourite now. I love it a lot.
The most iconic one is the opening of Neon Genesis Evangelion ;)