For me it's much more than just the fish. It's the entire package. I view aquariums as 'art' as well. I use them to enhance the room, since I don't have tanks in a 'fish room' or in my garage. I'm not about to put an ugly, bare tank in my living room. A living room tank should enhance the room, not make it look ugly. An aquarium will always be the first thing you notice when you walk into a room, and if you care about how your living spaces look at all, it should look good.
This is the first thing you see when walk into my house