sister- she's my bff. i spend weekends over her house a lot. she's the mom of my two nieces. we're 10 years apart so we didn't start hangin' tough until 2005.
big brother- he's the one i really grew up with since my bigger brother was gone by the time i came along and by the time i was 6, my sister was off to college. now, i only occassionally see my brother. he STAYS busy. he does a lot.
big brother and sister are like having a second set of parents. you should have seen big brother's reaction to my latest tattoo despite having 7+ of his own and one being in a similar location. his response: "BUT I'M A MAN!"