I belive that the term addiction is when a HABIT of doing something becomes not a simple Habit, but a NEED.
You become reliant on Drugs, Alchohol, sex, Gambling, and so on.
I have heard of things like Chocolate addiction and so on, so it wouldnt surprise me if things like Video Game addiction exist.
To me, however, no.
It is not addictive in the slightest.
If you gave me a good reason, i could, and i would, stop gaming completely the next day, and live without ever playing a video game again.
Edit: What i really mean is that if you become DEPENDANT on gaming, then it is a addiction.