I'm the baby of the family, and not like "my siblings were toddlers and preschoolers when I was a baby", but like "a decade and a half older than me, people sometimes mistake them for my mom" older. Real talk though, having a sibling way older is one of the greatest blessings of my life.
1. She has so much adulting information
Taxes, budgeting, career advice, YES PLEASE. She's helped me with salary negotiations to relationship negotiations.
2. You have a built in "cool mom"
For real, she's got that older sister protective instinct without the I have to mold you into a functioning member of society. Best of both worlds!
3. She has already gone through all the crap of your 20s so you've got built in counsel.
Everytime I call her with my early 20's dilemma she was there with a "it's going to get better", a story about it from her past, and killer listening skills.
She's always down for building you up.
Ain't no drama when you from the same mama, and live in dif. zipcodes, and have an over 10 year age gap. There isn't any competition, only love and support.
Since you (probably) don't live together, get-togethers are AWEESSSOMMMEEE
Time is limited, better get to building the longest road in Catan so I can beat herin at least one strategy game. Also, just in general, when you only have so much time together you better use it all :)
You have a sounding board for all your crazy ideas
She'll process, then encourage, and when I inevitably change my mind or perhaps realize that it was a bad idea, she'll just encourage me the next time.