But that doesn't change your tendencies and dispositions necessarily, as I'm sure this paper is examing. I think there's a bit of fudging often when discussing personality on exactly what personality is.

Depends take imagination. Im sure there is variance in how imaginative people are intrinsically. But I bet the biggest difference is time dedicated to embracing that trait and expanding ability. Are you naturally a daydreamer, or are you hyper focussed on the here and now and perceive taking time for pure imagination as wasteful or worse puerile. Just a change in attitude and time spent might be all thats needed.