It’s a lot like owning a Great Dane instead of a Chihuahua. You need to think about slightly better fencing, a bit more food, and bigger and better shelter.
But they really are like big dogs — they’re very friendly, very inquisitive, but like a dog they’re very easy keepers once you get your system down.
And like dogs, some goats become almost lap animals, while others might remain a bit more standoffish. All goats will swarm around you when you have some goat treats, but they’ll each have their own personality. Again, a lot like dog ownership.