I am youngest of 3. Sister 5 years older, brother 1 year older.
My sister is a mainstream church-goer. My brother is a raging conservative (but not religious). I often wonder how, with practically the same upbringing, my brother and I ended up so different. (I jokingly tell him I'm just to the left of Chairman Mao!)
They both look upon my spiritual and tarot interests with dismissive bemusement!