Nononono - from the creator of Elfen Lied. a drama about a girl who must pretend to be a boy in her pursuit of becoming an olympic ski jumper. introduces ski jumping and makes it interesting, while balancing dramatic, comedic, and romantic elements.
Dance! Subaru - a seinen manga about a troubled teenage girl who is a genius dancer. despite being a ballet manga, it's really intense and the main character, Subaru, is so hardcore she'd make Frieza cry.
Otoyomegatari - from the creator of Emma. a slice of life-ish look at the daily lives and customs of a nomadic tribe in central Asia. gorgeously detailed drawings, relaxing narrative.
Witches - short stories about witches, more in a fantastical, mysterious wiccan way than the evil, hideous cackling kind. the art is beautiful, a little loose and experimental. the stories are thoughtful and quietly, refreshingly moving. kind of like standing still in the ocean.