19 Days
I can say without any uncertainty that this is my most favourite shounen ai. Well, maybe with the exception of Ichikawa Kei's works.. but. Seriously. 19 Days is as good as it gets.
Ichi Ni no San!
I really love this story! It's very light shounen-ai and centred on both the romance and the friendship. It's fluffy, warm and cute. The romance is different, so some readers may not enjoy it as much, but it's more light, less passionate but very pure and innocent.
Usotsuki wa Shinshi no Hajimari
Quite an unusual plot, quite unusual art, I can see why some people would like it and others wouldn't, but I personally am very interested in the story and how it'll progress. (Waiting eagerly for updates. :D) Edit: GOD F*CKING DAMN IT. Jesus. Pardon the profanity. But.. ASDFGHEURGHHHH. Unfortunately the manga has been licensed and most of the hope of getting an update has dissapeared. The struggles.
Vassalord