Do you think of yourself as your mind, or your entire body?

I hadn't considered it until recently, however I was watching the news with my mother a few weeks back and there was a piece about the advances in prosthetic limbs. My mum mentioned how they would be great for helping so many disabled people, however my first thought was "Man I can't wait until the prosthetics are better than natural limbs, I'm gonna get me some upgrades". I flippantly mentioned this to her, and she looked at me with shock. "How could you possibly want to hack off pieces of yourself?" to which my response was "Why would you not want legs that never get tired?" This point did not resonate with her..

She clearly views herself as her entirety, however I came to the conclusion I view myself as a brain in an organic vehicle. I'm curious how you guys feel, if you'd ever given it any thought at all?

tl;dr would you get robotic legs assuming they are at least as functional as your current legs, perhaps with the added benefit of not feeling fatigue in them?.