Assorted Angles (back in the late 70's... using the "egg yolk in a nylon foot" trick)
I do NOT miss those original HOB filters !! 
Assorted Guppies
Albino Cory Cats
Assorted Platies (Wiki spells the plural form with: ies)
Yellow-Tail Damsels
Bangi Cardinals
Percula clownfish
Assorted corals & invertebrates
S+ CRS (shrimp & plants are my newest aquarium focus)
Hopefully some aquarium plants in my newly setup plant tank?
... assorted 420 strains