[The Doctor laughs a little.] I think melancholy and age are inextricably linked.
[He leans back in hsi chair, then, as his new friend starts flipping through the books. The Doctor even goes so far as to kick his feet up onto the table.]
A bit of everything, really. Science, science fiction, detective fiction, fantasy. No romance, though. I'm not one for romance. Not in books. Too domestic.