I'm not tring to knock sisters. I have an older sinister who I get along with just fine. We're fairly different as well, but we just acknowledge it. I always wished I would have had older brothers. That would have been cool.
My family knows how my twin sinister is and how difficult she can be about the tiniest of things. So they don't deal with her on many things. They go through ME. They ask me what's going on, or to ask her stuff, or to find out what she'd like to do as they are almost scared to broach various subjects with her. I honestly feel sad for her at times, because I know she has some troubles to work on, but she, of course, won't acknowledge them. I am the troubled one in the family and she prefers it that way.
So I am the referee at many family events. That's ok. I look good in a striped shirt! And I love whistles! TWEEEEEET!