I wish I was _ or 0 (or, at least, AAA). This would always sort me to the top of the list, so I will save time on looking myself up.
Honestly, I think the names system is too complex and obsolete, and it would've been much more convenient with binary GUIDs. In tight circles of friends or co-workers you can refer to people by some 2 digit hash (How are you doing, eighty-four? Doing well, twenty-five, how are you?). If there are only a few people in the room, you could use 1 digit, unless it's ambiguous.