What is the number of players you prefer in a game? Is is based on map size? If so, how would you break down the default (and popular non-default) maps by size? Small, medium and large? Which maps belong in which category and what would you say would be the right number of players for each group of maps?
If you don't think the number of players should be related to map size, what factor(s) do you think affect(s) having the 'right' number of players on a server? How many players is too few? How many is too many? Why?