There are a lot ,but i think that this one is so good ,i's so cute lol http://www.mangago.me/read-manga/eigyou_nika/
Life senjou no bokura
Golden days
Hidamari game kikoeru
Lover boy
Here u r
Master pieces
Teikoku kyoudai
So underrated so funny. It's shounen ai though
Dog style cuz its the only manga made me cry
dokyuusei cuz its under rated but absolutely brilliant
Genwaku no Kodou, because the story is so different from most Yaoi, has unusual art and lots of chapters (so the mangaka can really develop complex characters)
You're my loveprize in viewfinder because the plot is amazing, artwork is beautiful, and its hot AF (=・ω・=)
that's it, i want to know what you like em so much :)