have you raised any goldfish yourself to say they have no personality??
many goldfish keepers will tell you, and have posted already, goldies can be extremely active, get to know their owners, and will follow you all around a room, come right upto the glass or just chill in a corner watching you. they do the same things as any other fish we all keep, except actively hunt other fish. and even that, ive had a few goldfish over the years that would swallow ANY fish it could get into its mouth, be it goldfish or other species.....
the rarer, and more exotic varieties of goldfish also present some amazing colors and finnage, once again, letting them rival many other fish we keep for looks, and maybe surpass some. when you think about it, theres not many other fish who can have such long, flowing tails as a goldfish, which is quite nice to watch while their swimming around in a large enough tank/pond. when their not inbred or sick, their very graceful swimmers and quite enjoyable to watch as a change to our fast moving, sometimes hard to focus on predators