You both have similar tastes.
Since you grew up together, you are most likely to have similar likings. A love for similar music, food, destinations , TV shoes- all bind you together and closer.
You never discovered BOREDOM until you left home for college.
A family get-together, or a house lockdown- no situation can stop you from having the time of your life.
The LATE NIGHT bonanzas
This is invariably the best time for bonding during any day. Late night walks, late night talks, late night snacking, late night movies- your days seem to begin only at these wee hours.
They make you tough enough to face the outside world.
Its admirable how siblings, knowingly or unknowingly teach you the ways of the world. You argue, fight, cooperate, come to a census , agree, disagree, learn to work as a team, learn healthy competition- all this and so much just inside the boundaries of Home Sweet Home.