Wow, they seem pretty bold! They don't appear shy like most other WCs at first
I agree, I have a lot of wild caught fish (cichlids and characins) and these guys are so much more robust right out of the bag.
I had done a lot of reading and study before getting them and across the board there is the warnings that Altums are very difficult to acclimate. But, I got them from the Wetspot and was told they had held onto them awhile to get them prepared to eat flake and to ensure they were healthy. I think they did an excellent job in doing so.
I have never had Angels of any kind so I was not prepared for the robustness, activity, and curious nature that they have. It has been a wonderful surprise.
I have raised discus for about 17 years-- a much milder, slow, and passive fish. Although, they too can be aggressive among con-specifics.
I also have, as far as cichlids are concerned, wild geophagus, Bolivian Rams, biotodoma cupidos and wavirini- all were much more difficult to get settled down into the aquarium.