Does anyone care to share why you selected the name that you selected? 
In my working days, I would complain about not being called by my name and I would get told I should be happy that I wasn't "called late for dinner." That I was never able to get anyone to call me by name was driven home on my last day of work. Someone spoke to me by name, and I was asked, "Why did they call you that?" I explained that it was the name my mother wrote on my birth certificate. She woke my dad up that day and said, "It's time to go to the hospital." Dad left for the hospital. A neighbor drove mother to the hospital. Mother had worked for years for the doctor that delivered me, and when she was told that he had died before he could sign the birth certificate...she started to sign his name. By the time my father reached the hospital, I had been born, the doctor had died, and I had been given the name of the doctor who delivered me. I think I know what name I was supposed to have, but I never really learned to respond to that name.
When I was growing up in Grand Rapids, one of my favorite newspaper columnists was "The Old Curmudgeon." He rode to and from work on the Cherry Street Bus, and always included something in his column that he overheard on the bus.
I've looked up the definition numerous times, but a curmudgeon is basically a grouchy person. with a connotation that he is typically an old man.
I have reached an age where I told my daughter on my last birthday that she could buy an over the hill candle for my cake, as they don't seem to make them with ages older than I was turning.
I have fought a lot of strange battles in my life. (And won a few.)
On the day that I joined AD, I had listened to Paladin Elspeth read what she was writing in response to what I perceived as a personal attack on her. I was having a bad enough day as it was, and I felt that I needed to join in and defend my wife. :knight in rusty armor smiley: (Having read and listened to several hundred of her posts, I now realize that she is far more capable of defending herself than I ever will be.)
Anyway, I had to choose a name that I was comfortable with, and I was basically uncomfortable with the fifty odd nicknames I had acquired over a lifetime, so I chose Curmudgeon on the spur of the moment because I was feeling like a very grouchy old man that day.
I was on the site only a few hours when I got welcomed aboard as "Mudge."

In my PMs, I am called that far more often than I am called Curmudgeon, so I have learned to respond to that as well.