I've had a 55 gallon fish tank for about 7 years.
Currently we have:
1 pleco ("Mr Clean", about 5-6 years old, it's about 7 inches long)
1 upside down catfish ("Upsie", about 5-6 years old, has been missing fins/barbs for years)
6 homebred Sunset platys
I don't have pictures of these yet... it's very hard to photograph a moving school of fish!
Today we added:
2 Blue Wag platys ($1.99, Petsmart)
2 Blonde Delta fancy guppies (male, $1 sale, Petsmart)
I will be adding more fancy guppy males and different colored platys soon. I'm considering a small school of Julii or albino corydoras too.