The reason some tattooists recommend you steer clear of this type of tattoo comes down to the ability to get ink to stay: "Hands and feet are the most high-motion of areas on your body," said Bang Bang.
This is coupled with the fact that the sides and bottoms of your hands and feet don't retain pigment the same way the rest of your body does, which is why the palms and soles of your feet tend to be lighter than the rest of your skin tone. "As the body doesn't hold pigment in those areas naturally, it's hard to get it to do it artificially."