Time. Time. You have changed, but, your brain is still trying to catch up. Do you listen to yourself, throwing in the rationale that only fully operational people put forth.
You will never be the same, having had this life-changing event happen to you. Even if you got everything back at 100%, you will still not be the same.
There is darkness where there was light, but, you will find the flashlight.
I understand your wife, it has to be spooky as hell to be in her shoes. (Your shoes too, but, for a second, it's all about her) What if you are never the same. Will she have to take over? Can she? Will she? All the things she is probably asking herself. Until she realized that you are a different version of yourself and still funny as all get out. Don't you worry about that. It's good that you can see yourself in that light and that you aren't just laying down, letting fate dish out dinner to you.