I have one tomato that hosts a GBTA and is buddies with my 3 cross' damsels, p.j. cardinal and lemon tang. Doesn't bother me at all when I clean the tank and eats from my hand. But it seems everyone's experience is different. His personality may stem from the fact that I've had him since he was very small; doesn't know he should be mean...
P.S. His name is Homer, and I love him...[: