I used to have 1 drink a year, on Christmas day....maybe 1 on New Years.
People in AA call the brain damaged types "wet brains". I actually have met a guy at an AA meeting that was brain damaged by his drinking, but he did recover some after a while (supposedly).
It is good that you don't drink often. I haven't drank a beer or anything in at least 3 months (not sure) and it was just to humor my grandfather. I usually make an excuse to not go out drinking with certain friends. Something ALWAYS happens when I go out drinking with those fuckers. Thankfully I am not the one that gets the DUIs, broken limbs, bruises, etc.
I drink much more often now than I used to. But this discussion has been interesting, because I had already decided to go back to my old habits. I also think smoking affects your brain and I'm giving that up tomorrow.
Apart from the health aspect, I just think I am a different person with NO chemicals in my body. So I think I'm going to give it a shot.