Do I get my haircut for ME or for my wife?

I like my long-ish hair and now that it’s going a bit grey, I’m getting this whole Sam Elliott thing going with it. which I think looks really good. Plus, I feel more “myself” this way.

My wife, however, wants me to cut it short, neat, conservative, whatever. I HAVE done this before several times in the past for her, but never liked it and always wanted it to grow back. One MIGHT say, “It’s just hair, make your wife happy!” Another might say, “wear it however it makes YOU happy and you’re wife should accept you the way you are instead of trying to change you.”
I couldn’t find an iPhone app to help me so I’m reaching out to the Fluther community.