Chookin, Lovely Kid, Punk, Kitten, Kidden (that's just a variation of 'kitten' though), Pumpkin, Little Weirdo (DP hates that one!), Kidlet, Boylet, Sweetness, Mini Monster, DestructoBoy...These are the main ones, sometimes others come up! I tend towards Kitten and Punk lately, though.
Not very nice, am I?? LOL!