they gebnerally pic mods because they are model users .. they help out around the community.. have little or no ban record and are generally cool people tyhat help out around the site wether it be organizing contests, NG meets, helping users out in the where is how to forum.
plus being friendly with the mods helps.. i mean they arent going to pic someone if the mods dont really know them.. its a trust issue since mods have powers to ban people and potentially make people never want to come back to this site.. so yeah being cool being helpfull and being friendly with the mods helps.
me personally i would never want to be a moderator .. too much responsibilty.. this site is fun for me.. being a mod would change my experience here.. although sometime i see a thread made by a retard and i really wish i could lay a nice ban on em .. but oh well .. the mods do their jobs here pretty well