Onyen Annoyance

In a few days my UNC Onyen password expires, and it will continue to expire every 90 days after that. The typical semester is more like 120 days, so why does UNC force a password change so soon? I am as much for security as anyone, but UNCC seems to have a better system, they force a password change once every 180 days. I sort of think that password expiration should be based on the strength of the password. I don’t feel like my password is at all compromised…. I never write it down, and even if I were to say it out loud, no one would remember what it is. I do appreciate the fact that UNC wants us to keep things secure by not reusing the same password all the time, but damn this is annoying.