say the letter "m", then say the letter "T". MT = empty hehe. At least, I hope.
There are many many fish you could put in a 10 gallon....
small cichlids, most tetras, small gouramis, dwarf puffers, small brackish gobies, small danios, a siamese fighting fish, a few types of loaches, smaller cories, any livebearer, some types of minnows, smaller barbs, etc etc.
They're all interesting.
Fish i think that would stand out are shell dwelling cichlids and dwarf puffers. Shell dwellers need harder water, but some crushed coral will fix that.