Favourite OP/ED?

Simple question. Which Toaru OP/EDs do you prefer?

It's a guilty pleasure of mine, but I love opening and ending songs and I have to say I'm kind of fond of all of them in a way. Though if I were to pick favourites I'd have to go with:

ED: Chikaigoto

It's a great way to end the first season. Song aside, the animation in particular is pretty heartwarming. Everyone gets a look in to some degree and it really gives the whole thing a 'happy ending' kind of send off. Even Stiyl and Accelerator are smiling. (Himegami not so much, but I don't know if she has the capacity to smile.)

OP: No buts

This was a lot tougher to pick a favourite for, but in the end I think this particular opening sums up the series pretty well as far as atmosphere.

none of the toaru op/ed's really stuck with me for some reason.

on the other hand, the op video itself of the first one of the first season did. it was just well done XD

on a very unrelated side note, my favorite OP of all time is probably Air Gear's first op Back On - Chain

Very hard to chose, there's too many I love...
Reducded to the few I really, really, love:

To date:
OP: https://www.youtube.com/watch?v=fASNNjCzYl8, https://www.youtube.com/watch?v=aV_yG32EIE4, https://www.youtube.com/watch?v=Yn6S-bz1KD4 and https://www.youtube.com/watch?v=6coHAXzwMiQ
ED: https://www.youtube.com/watch?v=nPmbtLULELU, https://www.youtube.com/watch?v=scHz4GhwosE and https://www.youtube.com/watch?v=aL3X9DDudgo
+ Anything else sung by Mizuki Nana, Chihara Minori, Hirino Aya, Himemiya Milan, Kitamura Eri, Tamura Yukari, Nakajima Megumi and fripSide, in that order.

This Season:
OP: https://www.youtube.com/watch?v=JZNOFWYE3j8 and https://www.youtube.com/watch?v=KDaAJQsO3m8
ED: https://www.youtube.com/watch?v=xnOJtfBXLKY