If you want to spend some time on it, go with discus... you could get 2 or 3 discus in a 30 gallon tank, just make sure you cycle the tank with some tetras or something first, and make sure it's perfect water parameters for discus, because they are expensive. If you get them as babies they're cheaper, though. Also make sure you have a good heater because they need 86 degree water.
i never wash my hand. hell, i eat pizza while i'm taking a shit.