THE most overused pet/child GD name is Cassidy. PLEASE FOR THE LOVE OF GOD, use ANYTHING ELSE. A small list, if you will(feel free to condense them into nicknames, too) :
One Eyed Jack
Big Boy Pete
Skullfuck (just kidding)
Too many from which to choose. My real suggestion would be to find the song that's most special to you and draw from there.
"Heeeeere, Skullfuck! Come here, boy!"
"Once in awhile, you can get shown the light in the strangest of places, if you look at it right." - R. Hunter
"If we had any nerve at all, if we had any real balls as a society, or whatever you need, whatever quality you need, real character, we would make an effort to really address the wrongs in this society, righteously." - Jerry Garcia