With saltwater, you can't pack too many fishes without having algae problem. A freshwater tank would be impressive looking with a shoal of 50 or more Neon, or a school of 25 or more Harlequin Rasbora. People have different favorites & opinions. I don't like Tiger Barb, they stress me when I see them biting each other. Danio are too fast and make my eyes go loco. Here's picture of my neglected 55 gallons planted tank:
I haven't got around to reconnect the CO2 back into the tank for about 3 months now: http://uweb.txstate.edu/~xp42012/mis...ed-tank006.jpg