Well, TF2 doesn't seem like a disorienting game per se, but the generally fast pace of the game can and probably will add to the disorientation.

Personally I wouldn't call it addictive either. But from the sample of people I have around me, I'd say that games with instanced gameplay tend to take up a lot more time than expected, especially if the next round is loaded automatically. It's what I like to call the "One more level" problem. Every round is relatively short, but the number of rounds has a slight tendency to get out of hand.