Thanks a lot @doughtaker! :-)
Yes, I also like this simple chart, I use it quite often to explain for example the work-related fatigue that you just revealed.
Concerning your question... I would not put it that way. Well, our brain does need stimulation, and we tend to repeat those activities that give us pleasure and avoid the inconvenient ones. This MIGHT lead to addiction of any form, and yes, many end up doing something addictive. But the problem with addiction is the same that you explained with the games: after a while the same amount (of alcohol, nicotine, adrenaline etc.) is not enough... We need more and more to get rid of A2 state.
So the best is to try new things, collect exciting new experiences - not to lose our curiosity I would call. Looking for pure hedonistic pleasure without this curiosity can easily push us towards addiction...