1. Cross Games: pretty much what everyone else said, it's just that good. It's not even my favorite Adachi manga either.

2. Regios: I'm a big fan of overpowered main character that doesn't need a bunch of power ups to be able to beat random grunt #2.

3. FMA: I didn't like the original FMA, but i am a big fan of the manga. It's always a plus to see faithful anime adaptation since i'm still bitter about quite a few unfaithful ones.

Other good series: Guin Saga, Hayate 2, Ippo, K-On and Hatsukoi.