I once told one of my interviewers that my biggest flaw was being honest.
"Oh but good sir, that is not a flaw!"
"I assure you it is, in this day and age."
Seriously! I never lie. Ever. To anyone. Personal ethics code. At best I abstain from speaking. It's not an option when someone asks you stuff directly in an interview, though.
Case in point. Just got off a phone call about a paid internship in management. (Only need a high school diploma for that company, apparantly). It was going well. I was telling her that I want to be in a position where I can contribute to a goal, be it a societal goal or the traditional business goal of simply growing bigger. I don't only want to be a cog, I want to make stuff happen, and management is definitively a crucial part of it.
"Where do you see yourself in 5 years?"
Oh boy. Fuck that classical bullshit question I swear. It's a blinds store! I don't want to stay there forever. It's a good environment, sure, but at the end, you're only still selling blinds.
So I answer truthfully. I never bash anything, rest assured, but in my head the perfect place for me is within the education sphere, where I can help the next generation grow everyday, be it even a little, with my efforts (even if I'm just the lowest of clerks). "Well, it's a tough question m'aam, but eventually, one day, I hope I can contribute to this society's education system and help out futures generations in their development."
Was it a good answer? Yes. It's noble, it shows ambition. Was it the one she wanted to hear? Probably not! Probably wanted to hear me say "Well golly gee I'd sure love to manage one of your blinds store!" Well duh. It's a great stepping stone. But who would really just want to do that, settle in and leave 40 years later?
Think I'm gonna have to write down a truthful yet evasive yet good answer for that question. Something among the lines of "It doesn't matter where I will be nor when I will be there, as I will always look forward to more and better ways to improve myself and the company for which I'm working".
But even that would show too much ambition. I don't know.
TL;DR : Silly employers asking questions nobody in their right mind would truthfully answer "Yes, I totally want to stay here all my life".