In certain cases, decisions based on emotion can result in undesirable consequences. There exist several examples of impulsive shoppers who get consumed by the emotion to acquire and buy something, and consequently, end up with a purchase they later realize wasn't required at all. Advertisers and sales personnel, aware of this tendency, often play with this emotion to their advantage.
A more severe example could be of substance abusers and addicts, who, in a moment of high emotion and drama, triggered by an adrenaline rush, make decisions they might need to regret later. Gamblers, guided (or, misguided, rather) by the emotion of avarice and the "high" of winning could end up impoverishing themselves and their dependents. One also comes across people who make the wrong dietary choices, to satiate their taste buds, thereby posing a danger to long-term health.
The examples discussed above present the seamier side of decisions based on emotion; however, it should be recognized that certain situations require that decisions be guided not by logic, but by impulse.
The adage "sieze the day" suggests that one should let the heart rule over the head, and grab an opportunity with both hands. In other words, instinct and intuition can aid in better decision-making sometimes, rather than mere dependence on logic. There are several examples of business honchos who claim to have taken risks, guided by their hearts, and reaped benefits of such decisions. In contrast, there are others who lament the loss of opportunity because they "thought too much" and were hesitant to follow their heart. In short, decisions based on emotion may not always lead to