[Kiatsu]

naruto & gaara = same childhood
sasuke = worst

since it was a tragedy when his parents was killed by his own brother ... (Spoiler from the manga's latest chapter --> don't read if you dont read the manga)

Spoiler

he killed his own brother and then Sasuke later found out that his brother only did all that because it was his duty and that he has no choice and to protect him as well >.<;;

complicated childhood... >.<;