GE-Good Ending is one of my favorite mangas ever. It's a story from normal people, no super powers, nor aliens, etc. (most of the things that you actually see in loooots of mangas nowadays)
The story is very good, I got addicted to it since the first chapter I read; the characters are pretty well build (design and emotions), everyone with their very own characteristics, and I think you can get involved with them very easily. This manga is heavily recommended for all the people that like Comedy, Drama, Ecchi, Romance, School Life and Shounen stories. I got pretty much involved with each character, and I even found some usefull stuff to use in my real life (yeah, believe it or not).
That's everything I could figure out to put here, since I'm not very good in writing reviews or recommendations, but I had to do a review about this one, cause I like it a lot. That's my first review, I hope you guys enjoy it.