Xenoglossia was a good mecha show. It may not have been much of an Idolmaster story, but it was way more interesting than the "true" Idolmaster adaption sounds like. Don't forget that Mahou Shoujo Lyrical Nanoha is a What-If story.
Appleseed XIII: The movies haven't really done the concept justice, hopefully they can flesh it out a bit more.
Blood-C: I'll admit that I'm a sucker for CLAMP character designs and that promo art looks great. Hopefully less emo than previous adaptation.
Usagi Drop: Huge fan of the manga, and anyone who liked Aishiteru ze Baby should definitely watch it too.
Ikoku Meiro no Crosiee: I tend to really enjoy period stuff, and there isn't always enough of it lately.
Manyuu Hikenchou: I've watched a lot of the other horribly trashy action shows these past few years, what's one more?
Highly anticipating the Sora no Otoshimono movie. Without a doubt it is covering one of the best arcs of the series.