I still think that boys are easier than girls....haha. I mean, both genders come with their sets of struggles and difficulties, but my husband's brother has all girls - 2 of his own, 2 stepdaughters. They are all older than our boys, but gosh it seems like one of them (at least) always has some trouble and/or drama going on! :/ It's tough! It's so sad to see kids growing up negative. It really bothers me when my son gets in that mood. Hopefully he and your niece will soon outgrow it!