2012 was a pretty mixed bag, there was some good anime, and there was quite a bit of crap, but that's not what we're here to talk about. So, what are some of your favorite OPs and EDs of 2012, also check out the Best Music of 2012 thread over in the music section.
My favorite OP
Well it's Platinum Disco from Nisemonogatari, but Aniplex are dicks so there aren't any versions on jewtube. So here's my second favorite OP instead.
My favorite OP of the year is Crossing Field from Sword Art Online, which is currently up there with Darker than BlacK and Mirai Nikki in contention for my favorite OP period. honorable mentions to No Pain, No Game from Btooom
Huuu boy, where to begin. There were a lot of openings this year I really liked, the ones at the top being the opening from Tasogare Otome X Amnesia, the Hagure Yuusha no Estetica opening, the opening from Another and the opening from Oda Nobuna no Yabou. In the end though, I'd probably have to go with Tasogare Otome X Amnesia's opening. As for endings, probably Ano Natsu de Matteru, with the ending from Highschool DxD as an honorable mention (for the ecchiness).