(This was a tough one an really made me think hard about it. Only going to answer this for Destiney though. I haven’t decided for the other two characters. Thanks for asking @house-vexile)

Destiney always says she thinks the activities and games at the Gold Saucer are dumb. That gambling is foolish. But that is partly because she has such poor luck when it comes to gambling. However it is also something she secretly wants to do. Including actually becoming a decent Triad player.)