Our son adores his older sister. He hangs on her every word, does whatever he can to please her, and pretty much worships her existence. To say he loves her simply wouldn't adequately explain his feelings for her.
As a result of this, he is insistent that this new baby be a girl (he has yet to fully understand that I have little control over this). He repeatedly says, "I really, really want a baby sister" followed by, "I don't want a brother. No more boys is this house." I, on the other hand, secretly am pining for another son, although either would be a joyous, welcomed addition. Part of me now though really wants to have another girl just for his sake. The thought of him taking care of and fawning over a baby sister melts my heart and while I know he'll be a terrific big brother regardless, there is something incredibly sweet about the thought of him with his baby sister.
Not to mention it is the cutest thing in the entire world to hear him say the name we've chosen if this baby is a girl.