And if so, what's in there?!
I think I do, in so much that despite a fairly busy life I spend quite a lot of time in my own head, and I like it.
For me, a rich inner life means I enjoy thinking about a range of 'non essential' things like music, nature, art. I'm interested in my own ideas and in how I process the world around me. I am company for myself, if that makes sense.
Unsurprisingly I'm therefore quite happy spending time alone. I am also very sociable. So it's not at the expense of connecting with others.