I like this. Thinking out loud...

Maybe this could be reduced to something like "desire for novelty". But then I think that's too broad. For example, wanting the latest iPhone is a type of "desire for novelty". Would you consider someone a curious person just because they buy the latest Apple products?

Then maybe you could, instead, only consider "intellectual curiosity", where intellectual curiosity is the desire for new knowledge - descriptive knowledge, prodcedural knowledge, experiential knowledge, etc. Then I guess getting the latest iPhone is also a type of experiential knowledge, so this fails, too...