I've taken 17 at most, though it's just my first year. Next year I'll be taking 18 both semesters, which is the maximum amount of credit hours we can take at one time. The 18 credit hours include three science courses with labs, though, so I expect I'll have no life next year.
Maybe the most any of us can expect of ourselves isn't perfection but progress.
"But this too is true: stories can save us."
"No life is a waste," the blue man said. "The only time we waste, is the time we spend thinking we are alone."