Currently I have a 55gal FW setup with driftwood and plants that houses an assortment of tetras and an adolescent chocolate plecostomus.
I also have a 30gal and 10gal tank, but at the moment they are not up and running. The 10 started as freshwater and eventually went salt with 8-10 lbs of live rock, a few crabs, turbo snails, and a clown. Unfortunately the clownfish jumped out through an opening in the lid (my fault considering this gap was caused by my *cough* modifying a protein skimmer rated for a 75gal tank for use in my 10gal.) When I found him, it was sadly too late.
I have big plans once I get a house, but for now, with a dog and a cat entering the mix, my hands are tied and space is limited.