Curiosity is hugely important to me as it's the foundation of intelligence and intelligent discourse, and I need to have that with someone to be able to respect them. Some guys though, all they want is a particularly inspiring body part or openness to a particular sexual fetish and they think that's the basis of a lifelong relationship. Or that it even IS a relationship basis at all.
Others would want emotional connection, or a near-absence of expectations about THEM, or a shared enthusiasm for the same hobbies, a [lack of] desire to have children together, or any number of things.
Bottom line: meaningless question and the most common response may not be a good one anyway.