You know those questions you have to answer when you get locked out of your account and need to reset your password, "what was your first-grade teacher's name", that kinda thing?
These questions should never be subjective. You think I can tell you what I thought my favorite movie was when I signed up for this account ten years ago? Who do you think I am, Roger Ebert? I couldn't tell you conclusively what my favorite movie is now. If I was forced, today, to answer that question to sign up for an account, I promise I won't remember what I said a couple years from now.
Also, for the love of god, don't make the answers case sensitive! I got locked out of an account recovery process for guessing purple, blue, and Purple. Luckily, it let me try again 30 minutes later. Turns out the answer was Blue. Why did past me decide this word deserved the proper noun treatment? I dunno, you'll have to ask them.