I do fine with academic work, but I have very little common sense, which society in general tends to value more than academic intelligence. So even though I know I'm smart, people often don't realize it, which makes me feel dumb quite a bit. In other words, I know how it feels to not feel smart enough. It sucks.
True...but I'd say it's more common than academic intelligence. I, at least, know more people with good common sense than people who do/did well in school.