let's see... I have 3 younger siblings and they're all girls...
my sis and myself get along perfectly fine 99% of the time, 1% is all rage when she's on her period >.>
my step sis and myself get along perfectly fine, unless her brother is around...
my half sis and myself get along fine... but she's 4 and give's me headaches.

The only problem I have with my step brother is that he like's to touch me in places