I've had a female leopard wrasse for only a few weeks but shes been a model citizen so far.
She hides early (just when my lights start to dim) and comes out late (2 hours after they come on) so yes they hide, but shes been a joy to watch so far.
She nips at things like an angel would, but seems to be more surgical about it. My flame will nip and corals will close, but the leopard nips and they dont so I'm not sure exactly what is happening but shes far less intrusive than the flame.
Hope that helps. I'm sure someone with more time with one will chime in.