Can't say I've ever met a dragon - quite a few reptilian creatures, like the Silurians and the Sea Devils, but nothing uniquely draconian in nature. And the last demon I met was an alien- well, everything's usually an alien, except for when it's on its home turf, of course-

[Including the Doctor. But that's terribly nitpicky.]

Emptier? Mm, no, but-

[But some of his senses are out of whack. Just a little, but it's still noticeable.]

Funny, maybe. Not empty. Interdimensional travel without a time capsule does that to you, though. When it doesn't kill you, that is.