Ballmer, definitely. He'd at least listen to you, and while he may do the dad thing and leave you with a pat on the head and you wondering why Santa won't bring you that new case you'd wanted for Christmas, at least you'd feel that he tried.
Jobs would be the dad who yells at his kid to stop touching his stuff because your grubby little fingers would put marks on his shiny white furniture. Worse, he would TELL YOU what you need, and not give a damn what you said you wanted. "Dad, I just want a bicycle for Christmas." "Shutup and keep your goddamn hands off my iPod!! You're getting pajama's and underwear for Christmas, so shut up!"