Palate, aroma, and tactility all make up a characteristic taste. Additionally, the degree of roast makes up a characteristic taste. When a person states this coffee drinks has character, they really are not saying much. When left open ended, you can tell the individual has no idea what they are talking about. This is a term which a person uses when they can't specifically identify of what it is they are tasting.
Complexity takes on meaning when there is a blend.
The individual tastes the character of a Harrar with a Java. Two or more characteristic tastes are present. This term tends to mean no one taste overwhelms the others. In blends, balance begins to take on meaning. Balance in blends would mean that the character of one bean doesn't override the character of the others and that the different tastes are balance.