Not to put too fine a point on it, I find it curious when someone I hardly know or don’t know at all, asks “how are you”? The usual response for most people is “fine”. If you are just passing one another that answer is fine. But am I fine, are you really fine every time someone asks you? It’s perfectly fine to say you’re fine, but do you really mean it? When you are passing someone do you ask how they are? Do you really care or is it just a habit? I have to smile thinking of the “Friends” character, Joey who had the classic, “how you doin’?
Either way is fine by me, do your own thing. Oh, by the way, I’m fine.