rising manga ideas

[aischool2]

Hello just wanted to put this up in regards to a manga i am making....Just wanted to get the masses opinion on what it would be like. Basically this is the story:
Foregin exchange student from Canada transfers to Japan after winning some contest. Meets up with this girl who has a brother complexe (he died in her senior year of middle school) and meets other comical characters. The exchange student (who ive named Mark) loves to fight and usually gets in sh!t for it by either Ayumi Mizuno (Brocom girl) or her best friend Kimiko Isioka. The three of them have to share a room due to over population in the school boarding house.

So hopefully i can make it so that everyone gets something from this...ive got comedy,romance,action, of course some ecchi scenes
But anyway what i really want to know is what are your favorite character types?....Story cliches and i dunno maybe character suggestions.

anything would halp me out alot Thanx