1. I've never even heard of it until now. 2. I'm not sure. A lot though. 3. Recently I've began to read Fullmon o Sagashite by Arina Tanemura and Pet Shop of Horrors: Tokyo by Matsuri Akino. And then there's Future Diary by Sakae Esuno that is really good. I read a lot, so those are only a few.
1. Nope. 2. .... eheh. No idea. 3. I'm a fan of more serious and classic reads. Try PLUTO, Monster!, or any of Osamu Tezuka's works. Naoki Urasawa is really good at what he does, too. Gurren Lagann, and Alive: The Final Evolution are good. Bride of the Water God seems to be a favorite amongst my coworkers... and, EDEN and Battle Angel Alita are great. 4. Nah. Don't have any.