Everyone wants encouragement, but some experts say that boys and girls perceive praise differently. Boys sometimes look at praise as manipulation and get uncomfortable if someone lays on the congrats too thickly. They still need praise, but it's best to be matter-of-fact when giving it.
Girls, on the other hand, love superlatives. Even then, experts say, too much of a good thing is too much. Extravagant praise can be almost addictive for girls, ironically lowering their self-esteem, and prompting them to start seeking encouragement from outside sources.