The last episode of Parasyte the maxim aired yesterday and what a ride it was... And a pretty satisfactory ending. If you haven't seen this series, it's highy recommended.
Another series that's coming to an end is Death Parade, which had some really great moments.
In April, Fate/Stay Night: Unlimited blade works starts again.
I'm curious about Seraph of the End, from Wit Studio (you know, the guys from Attack on Titan)
Finally saw When Marnie Was There, the latest Ghibli movie (and the first without involvement of Hayao Miyazaki). If you liked the bittersweet tone of The Secret World of Arrietty, you're going to like this movie a lot. Ghibli takes animation to near perfection. You actually forget you're watching an animated feature. I was really impressed both animation- and story-wise.