I enjoyed many shows this year, like Fate/Zero 2, Inu x Boku SS, Tasogare Otome x Amnesia, Acchi Kocchi, Chuunibyou demo Koi ga Shitai and more, but I think I'll go along with Bob2004 and pick Joshiraku.
Why? Well, it's a parody show featuring lots and lots of shout-outs, either to other anime, Japanese culture, or even politics. I've grown to love show these type of shows ever since I saw Pani Poni Dash and together with a great OP and super-catchy ED, this show was made to be a winner.
The only shows that come remotely close to Joshiraku are Acchi Kochi and Haiyore! Nyaruko-san, but the latter is not on the list. Plus, I found the EDs for both these shows a bit weak (or at least, not as good as the OPs), so Joshiraku has the upper hand.