As for me, It's Shiawase Kissa Sanchoume! I can read it over and over! Story is great! Art is beautiful! Fantastic characters! Its cute! I recommend this if you like romance, comedy, drama, school life, slice of life, and cake of course!!
I haven't read a lot but there was one... that was cancelled because the company went bankrupt, not because the manga was bad... called big order and that was a really good one... I've heard funimation may pick it back up.