I think it takes a while to see a coral as a pet.
A general quick view of the tank and they look like brightly colour plants but if you sit watching the tank for a while, you start to see their intricacies and "life".
Nothing fascinates me more than watching the corals react to feedings, watch each little polyp move in the current, opening and closing depending on how it feels.
I love watching the tank once the lights come on, each coral opening up from the night before and puffing up.
Definitely pets for me