I've had several lucid dreams, but how much control I have over the sleep environment varies. Sometimes I'll suddenly be aware I'm only dreaming when there's something unpleasant going on and then it's a kind of relief and I just shift the dream onto a more pleasant course. Sometimes the awareness that it's just a dream is a little more lasting and I actively try to use it, usually I try to fly
But I don't usually have full control. Typically, it's a bit hard to gain height above ground.
My perspective (such as 1st, 3rd) in the dreams can change as well, I think.
edit :
Thread moved to Lounge and cleaned up.