Funny you should say that, G_J, but some news thing on Crunchyroll mentioned a Season 2. I haven't seen anything beyond that, but still.
Anyways, as we approach the middle of the season, I'm going to discuss the shows I followed at any point, and my reasons for doing so.
Attack on Titan (Shingeki no Kyojin): As of now, I'm 4 episodes in, and I'm calling this my leader for Best of 2013. This show has everything short of romance, and the acting backs it up.
Valvrave The Liberator: As of episode 4, I am confused... in a good way. Sunrise + mecha is a good combination, and some decent acting, a great soundtrack, and some easily memetic moments (ERU-ERUFU!) make this a very enjoyable show. For now, at least.
HenNeko: 3 episodes in, and this show gives me mood whiplash. In all aspects, including it's studio (JC Staff), it should just be a romantic comedy. Not really. It actually seems to be a show about the troubles with growing up, with some light romantic undertones to start it up.
OreImo 2/
Railgun 2: If you liked Season 1, it's the same deal for S2.
My Teen RomCom Snafu: Wow. This was the underdog for this season, but it's good. It's a bit formulaic, but the way everything plays out each episode is different enough to keep things interesting.
Photokano: DROPPED. Just not my cup of tea.
RDG - Red Data Girl: DROPPED... wtf? This show has an interesting premise, a beautiful soundtrack, gorgeous visuals, and the worst plot and characters I've ever seen. How bad? TWO EPISODES IN, I hated every damn character because nothing made any F**KING SENSE-AAAAGH! But honestly, when you can't get the synopsis from the first two episodes... it's shit.