Houkago Edge
Surprisingly adorable and, while it didn't really delve into the issue of gender, it handled cross dressing and men liking feminine things with a fair amount of respect, which I can appreciate. The tags kind of scared me away from this story for a while but I'm really glad I read it!
Sora o Daite Oyasumi
I've read this manga probably 4 or 5 times and every time, I'm stunned it works so well. There are so many things that, when you look at it on paper, you'd think 'wow that sounds really over the top and unrealistic' but it's written in such a way that it completely draws you in. Even when it goes off the rails about halfway through, it never feels forced or unrealistic. Each character has depth and no one, save some flashback bullies, is a complete douche nozzle. My one major complaint is Shuji, ya know the main dude, never really gets fleshed out. He has his "thing" and a way to relate to the other guy, but he really doesn't have much of a personality. This definitely could have been fixed had this manga not been abandoned so it's a relatively minor complaint on the whole. Even if it's never going to be completed, I still say it's worth the read (just, you know, read the warnings carefully)
Bikkuri Suru Hodo Doji Na Koi