Ah, blocks of text, don't you just love 'em..

OP, do you go through life with a passive state of mind? Are you aware of the fact that you're aware? Do you stay on auto-pilot all the time?
You see, state of mind is very important when it comes to lucidity. I'm fairly certain of that. If you spend your time throughout the day accepting everything around you, questioning nothing, and generally thinking like a zombie, achieving lucidity while dreaming will be pretty darn difficult.

Why do you see a two headed person in your dream and just accept it like it's nothing unusual, instead of going "wait a second, this isn't normal, is this a dream"? Because you do the same thing in waking life. Well, not exactly the same, I doubt you see two headed people but still, the idea is similar. You never question your reality while you're awake, you just accept it and go along with everything, so your dreaming mind will do the same thing..