Becoming a father, I think it inevitably changes your perspective of life. I don't get nearly enough sleep. And the simplest things in life are completely satisfying. I find you don't have to do as much, like you don't go on as many outings.
I hate shaving. It's much easier to just do a little stubble, but my wife and daughter like it when I'm clean-shaven. If you see me with a clean face, then you know I'm in the kissing mode!