I have an uncle who is an extremely bright man... and insufferably arrogant and lazy. It's as if he has come to believe his high IQ is an end unto itself, and that somehow the universe was supposed to just bow down and hand him everything on a silver platter. He's an alcoholic who was abusive to his wife and kids (until she finally got up and left). But for years all I'd hear from my aunt was how awfully bright and tortured he was, and if you pointed out he'd barely made a living for years, you got some nonsense about him being a member of Mensa thrown in your face.
I have no idea what my IQ is, never really cared. Good at some things, struggle with others, but the one thing I'm not is a complete dick. I'll take happiness and a measure of success over some number on a piece of paper any day.