I'd handle shame-flavored incentives with tongs. It's plausible that I have an unusual degree of sensitivity on the subject, but I'm making progress on a very bad case of self-hatred and akrasia, and "is my curiosity good enough?" strikes me as a sort of self-alienation which takes focus away from paying attention to whatever you might be curious about.

"What might I be missing about this?", "How can I increase my enthusiasm for learning?", "How can I spend less time on errors while still taking on difficult projects?" seem much safer. "What am I doing to improve my life? Is it having the desired effect?" should probably be on the list.