We see a common thread: performance in nearly all games is increased with a low level of inebriation.
The question is... why?
Perhaps, and I'm truly guessing here...
I've noticed that my performance in a game (in easy-to measure situations, mostly: arcade style games) often increases substantially if I abandon it for a week and come back. Perhaps this break allows counterproductive inhibitions (flinches, if you wish to make a firearms analogy) to deteriorate. This makes sense from a neurological standpoint: the inhibitions would be coded by weaker connections than the main skills of the game, so decreasing all connections would eliminate the bad practices, leaving only the good ones.
I posit that ethanol, by inhibiting the function of the brain, mimics this effect. I don't know enough neuro-chemistry to state this with any certainty, but I believe that alchohol actually acts on neurons in a manner similar to the natural dendrite atrophy patterns. (Right? The affect on the calcium action potential causes the degradation, and prevents the construction of, synapses... right?)
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This doesn't mean that it's a good idea to drive while intoxicated. Driving is a low-risk-if-you-don't-do-something-stupid skill, whereas games are a certain-loss-if-you-don't-take-dangerous-risks skill. In other words, the last thing you want to do when driving is to treat it as a game.