Tang eating from hand?

I am wondering how many people have a tang or any fish for that matter that eats from their hand? My recently acquired blue eye tang has really made me believe she is quite intelligent. When I walk over to the tank she comes to the surface and sticks her mouth out. I can break up small pieces of seaweed and she will pick them out of my fingers or nibble on them while I hold them. Is this common?

 

I hand feed a lot of fish! My golden puffer would take pieces of squid from my hand.
At the LFS that I work at, i hand feed all the sting rays and there is a large foxface that thinks he is a puppy dog that will come up and beg food, and i hand feed him also.

 

The puppy dog pretty much describes it. I love my clown goby but this tang is really fighting for 2nd place in my heart. What a awesome fish.

 

My purple tang and clarki clown eats from my hands every single night! I knock on the glass 3 times and they rush over to me! "Dinner Time!"

 

my big nose unicorn tang eats out of my hand every morning and sometimes it looks like he is setting in my palm