Since it's smf that you're using, Holiday, you should be able to do away with rankings altogether.
In case you can't, how about levels of fruit? Like, you start out as an ordinary grape and then you advance to becoming a coconut. Eventually, after years of service to APF, you become a watermelon or the Great Pumpkin. Exotic fruits like the mangosteen and Miracle Fruit work for me, too.
Oh, and levels of candy: You start out as the common Tootsie Roll or Brach's butterscotch. At your midlevel development, you're a Hershey's nutbar, but once you pass mediocrity, you're fine handmade Belgium Chocolate (and reserve the pretenders for Godiva.) But, since I love Pop Rocks, this should be reserved for the ultimate supreme poster collecting being.
Jeannie