General curiosity:
* Curious (most straightforward)
* Inquisitive (implies a strong desire for knowledge)
* Investigative (suggests a methodical approach to exploring)
* Exploratory (emphasizes the seeking out of new experiences)
* Knowledgeable (implies a desire for learning and understanding)
* Interested (indicates a general desire to learn about something)
Positive connotations:
* Open-minded (willing to consider new ideas and perspectives)
* Sharp (intellectually astute and perceptive)
* Insightful (having the ability to see things deeply)
* Imaginative (creative and able to think outside the box)
* Thirsty for knowledge (an intense desire to learn)
Negative connotations:
* Nosy (suggests an intrusive or overly interested nature)
* Meddlesome (implies interfering in other people's affairs)
* Prying (implies a desire to uncover private information)
The best word to use will depend on the context and the specific characteristics of the person you're describing.