We have a 55 gallon in our dining room. Full of community fish. I too love the peacefulness of watching fish and listening to the water run through the filters. We also have a small aquarium in our guestroom which our new puppy decided to bark at this morning. She wouldn't stop barking while sitting on the bed watching the fish. It was too funny. She also tries to "eat" the fish through the glass of the aquarium.
Have fun with your aquarium.