Glory to the Alliance!
http://www.fanfiction.net/u/1313358/
^ My fanfiction. You should go and read it. And leave comments on it. Yeah.
Posted by: DataBase90
[...] Normal Marines are "too boring" [...]
Well, make them interesting then! :D
Marines are part of the war too, and they far outnumber Spartans and ODSTs. They must have had seen so many amazing and horrifying things. Think about their feelings and reactions toward the war, or toward their fellow soldiers. How might a marine feel, fighting alongside the much more powerful and valuable Spartans? Would he be inspired by them (as the games would imply), or would he feel useless or threatened by comparison? What parts of the war might marines see that ODSTs or Spartans never would? How do they feel when they first land on a beautiful, untouched alien world?
I wouldn't worry about your stories having similar ideas to anyone else's. As long as you make it unique, and show us your spin on it, it's all good. Though, personally, I think ODSTs are boring and I wish people would write more about other aspects of the universe. In particular, I find AIs intriguing and would like to read more about them. :)