Many people prefer it because of the feeling of euphoria and relaxationt that it provides. With that relaxation however, one's mental state can be altered to the point of being incapable of driving a car safely. There is also an altered sense of time and short-term memory can be affected. Lung damage can also result from marijuana use. Amphetamines or stimulants are also very dangerous.
Some examples are ecstacy, uppers and speed.
These drugs also cause a feeling of euphoria, but they also cause increased altertness, excitation, and restlessness. They cause an increased heart rate and blood pressure. High doses can cause a rapid or irregular heart beat, tremors, loss of coordination, and even physical collapse. Even more dangerous are amphetamine injections. An injection creates a sudden increase in blood pressure that can cause death from stroke, very high fever, or heart failure.