I would recommend...

Hikaru no Go- Great manga about the Go game, I was definitely hooked. Series is over, the ending made me little mad, but it was still the best manga I ever read.

Kimi no Iru Machi - Another great manga along the lines of Kaichiu wa maid Sama, but more on a realistic level per se. I enjoy it a lot

Code Breaker- I dont like this manga at all, it started out good, but the character I liked got trolled in his anger and hatred. That won't mean no else will like it, I'm pretty sure most of you guys/gals love those Jerk/with a heart of gold characters. I hate em but I recommend it anyway.