Depends what you really use the internet / computer for. If you sit at home all day playing games, not working then that's a bad type of addicted. If you work all day on your computer, and I mean work for money, then that's a good type. Just don't waste time.
I generally use the internet during the day to work which you actually cant call an addiction as the internet is only a tool to use for my business ( web / graphics designer ). But on the other hand i do use the internet for social network sites socialising ( the irony ) to some extent with my friends. Watch movies / watch tv etc. Most of the time im out living my life. Its better to seperate your business if its online work and your personal life as it can become ugly and messy at times. Sitting staring at a screen for hours nd hours each and every day is not healthy. But on the other hand i sometimes cant pull myself away.
I would say I have an internet addiction, I dont even watch TV anymore really as just find the internet so much more entertaining.