Insomnia is a curse. I had it for two years, and it nearly cost me my life:
For six months, I slept one or two hours per night. Driving from a business meeting on a lonely stretch of highway, I finally got some sleep--behind the wheel of my Corolla. I ran off the road, nearly slamming into a tree.
Insomnia is also bad for your health, as most people should get 6 hours of sleep per night. I personally believe it ages you, takes your emotions on a roller coaster ride, and helps you gain wight, since you have more hours in the day to eat.
Consult your doctor for more information.