10 - gallon fun
I have been thinking about the same thing recently. I just set up a 10 gallon tank about a month ago.
here's what I'm planning on doing:
1. Heavliy planting it (cos it's so dang cool that way)
2. Adding these fish: neon tetra's, a pair of blue rams (friggin cool little guys), and some otto's.
if you have a pair of blue rams, and you give them some time, you might even have the pleasure of watching them breed and raise some babies (which you can give to your LFS when they're big enough, my LFS is always in short supply of rams)
IMHO it's much more asthetically pleasing to keep fish in a small tank that are relatively small themselves. It just keeps the proportions right. For example, a swordtail gets pretty long (~4.5") and that might look a little cramped in the 10 gallon tank, but a platy is not quite that big (~2.5") so it looks a little nicer, and more appropriate for the tank. Blue Rams are ~3" max... neons ~1.5". All three are from south america (I think) and require similar water conditions. Blue rams might be sensative to the water conditions though...
-Josh