I believe that any measurement that uses the metric system is the easiest way to discuss values in general when discussing an amount of bitcoin with someone else.  I believe that slang terms like "millie" or "satoshi" should just be left out when trying to have an honest conversation.  Everyone tends to know the metric system universally since it's used for every type of scientific measurement, and I think that it should be kept that way since bitcoin is trying to become the first global currency.

Plus I mean think about it... while everyone on here knows what a "satoshi" is, is there any real reason to be measuring your bitcoin value in satoshis? There is literally no value in a satoshi, and it's misleading to say you have 1K satoshi's on hand when that still is in a sense, nothing.