Darker than Black's openings were both very action packed. Also, Soul Eater had a few good openings and endings like Resonance and Strength. Then I'd say that the opening of Umineko no Naku Koro ni was nice as well. and I loved all the attack on titan openings and endings
OP: tokyo ghoul:http://www.youtube.com/watch?v=Rhh9Bo5S0Vc akame ga kill:http://www.youtube.com/watch?v=lql6fpCmzA8 Ao no excorcist:http://www.youtube.com/watch?v=hNRME9Rx-XM Mekakucity Actors:http://www.youtube.com/watch?v=AV-_bh4u-b4
Best opening has to be Season 1 of Rurouni Kenshin. It's super scary for like 10 seconds then all of a sudden a cutesy japanese girl voice starts to sing. It's very misleading. I don't know about endings.
shingeki no bahamut opening:
shingeki no kyojin ending:https://www.youtube.com/watch?v=PcNzSGbXKUk
and I loved all the attack on titan openings and endings
tokyo ghoul:http://www.youtube.com/watch?v=Rhh9Bo5S0Vc
akame ga kill:http://www.youtube.com/watch?v=lql6fpCmzA8
Ao no excorcist:http://www.youtube.com/watch?v=hNRME9Rx-XM
Mekakucity Actors:http://www.youtube.com/watch?v=AV-_bh4u-b4
ED:
No ending (yet)
http://youtu.be/_nO0GcrkHtw
Just off the top of my head.
Did someone say Orange Range?
Getter Robo Armageddon (2nd Opener):
Shin Mazinger (1st Opener):