The ones who really take it seriously are among the most miserable, sour faced, unhappy, judgemental, disapproving people you could meet.
That has been the complete opposite from my experience. Calvinism is made to make you humble. It means you believe you have no reason to boast because it wasn't anything you did to earn God's favor, but everything HE did.
Armineans are the arrogant ones who think they are so smart they figured it out.