So I've think I've been tackling something wrong...

I've been writing down some stuff for my fangame plan recently and I've started thinking "I've been tackling this kind of wrong" Instead of what I want in my fangame I need to ask what people want to see in my fangame, how to make this game stick out from the others almost.

So what do you guys want to see in fangames? Characters design, mechanics, storry, etc. Because I really don't want my game to be like almost very other fan game out there.