I think it would partly depend on how the opinion was phrased, for me. I want a tattoo, and I know exactly what I want (a paw print with four hearts where the toenails would be, to symbolize four of the dogs that I've had). My DH does not like tattoos at all, and has asked me, for the time being, to refrain from getting one. He didn't forbid me to get one, or state that he would always hate tattoos. He asked me, as a favor, to not get one right now. I agreed. To me, it made a difference in how I took his opinion and request. If he was always asking me to do things or not do things, then I might have taken this one less seriously. However, he says something like this so rarely, that when he does, it has a much greater impact than it might otherwise.