A player who is constantly aggressive and plays many inferior hands is called a "maniac", and skilled players will take advantage of him by calling him more often, using isolation plays, and by other means.
Most theorists, like David Sklansky and Doyle Brunson, suggest aggression as an important tool.
Very strong starting hands should be played very aggressively most of the time.
Such aggression is deceptive, as the low and unpaired ranks of the starting hand require much improvement to win.
The result is larger pots when the aggressive player has tremendously strong hands.