So, for those of use who like our egg nog spiked... maybe we really should discuss the best liquor to compliment it.
I've tried brandy, whiskey and rum.
I always used brandy until my husband introduced me to rum, and now I think I slightly prefer that because it interferes less with the flavor of the eggnog. Whiskey doesn't sound as good to me, because that seems like it would clash even more with normal eggnog flavor.
But I think it's a good idea to get a bunch of those little bottles and try different things. Other possibilities: vodka, kaluha, amaretto, tequilla (OK, just kidding about tequilla) ...
The one thing that doesn't sound good as wine, which your history said was in the original milky mixture.
BTW, indepthinfo.com looks like a very useful site in general!