My philosophical interests trace back to two early childhood experiences.
When I was around 4, I was struck by the difference between touching and feeling: if someone else touched my arm, I only felt the 'my arm' side of the sensation. I didn't feel what they feel. Suddenly I pictured the world as full of individuals with their own experiences, to which no one else has direct access.
I failed Left and Right in kindergarten. It didn't make sense at the time that directions could be person-relative. I thought directions had to be fixed in space, like the cardinal directions. This might well have been the start of a long-term interest in indexicality. (And I still have trouble with Left and Right.)