Ze
This story is one of my favorites, but I can only read it once or twice a year. More than that and my pillow will never dry from the tears I shed over Asari and Himi. This is an epic story that is just hard to find in manga anymore, particularly in Yaoi. It's worth the time to read and the tears that you will shed.
Kitsune no Tama Yobai
Very cute and sweet stories. Found the dialog confusing...not sure if it was a "lost in translation" issue or the writing flow. Names and circumstances changed for some characters - like mangaka forgot their own story lines. Names could be due to translation errors.
Bokutachi Wa Asu Ni Mukatte Ikiru No Da
Cute but a little too quick. Conflicts resolved too fast - not enough "personal growth" for characters.
Sex Pistols
The only yaoi I've found, so far, to tackle male pregnancy so well. I know it's impossible, but this is fiction after all. Plot is funny and sweet. Main couple are pretty baka most of the time, but cute when they aren't.
Crimson Spell