Besides just creative and non-creative people, I think there are two types of creative people:  Those who think of lots of ideas and those who think of ideas that they can execute.  I believe that I am one of the latter.  I have at times thought that I am not a creative person, but I recently realized that I have thought of creative ideas, bringing together concepts, etc. and my ideas are ones that we can create or that we have created.  I build off of work that we have already done or have a vision that I work towards.  Just because I don't have lots of ideas (including some that can't be done), doesn't mean I'm not creative.  One of the benefits of the person who has lots of ideas is that they can inspire ideas in others.  I filter the ideas that I have and don't spend time working out ideas that can't be actualized.