dwarf gouramis and guppies. The dwarfs are very beautiful and have different personalities and the guppies because they have so many varieties and species.
African Butterfly....I'll have to start another tank for them one of these days. My last met a sad end when one of his tankmates (not sure who) decided that his fins looked tasty sometime during the day.
I'm probably going to be the only person, but I absolutely love chinese perch (siniperca chuatsi). Mine is dopey, but extremely fast when feeding, and he greets me all the time with the look of what I would picture an aquatic puppy to look like