Character concepts come from a myriad of sources. Sometimes we take an idea that is tried, tested and true. On other occasions we branch out and try new builds. Of course loading up Character Builder and looking for the optimal combination of class, race and feats can be a lot of fun and very satisfying.
For many character concepts we draw inspiration for a variety of sources. Whether this is fiction, personality quirks, or mastery of a weapon this single concept can lead to a deep and complex character.