I must the only one who thinks this, but I think it's kind of wimpy sounding, and perhaps borderline prtentious. Yes, there is the 'To Kill A Mockingbird' association, but that's not always the first thing that comes to mind. I had heard of the name
Atticus before the book or movie, to be honest. So, the whiny/stuck-up association is stuck with me, I guess.
The nickname Attie lightens it up a bit, so it's nice to me.