1. I don't see a connection between your over-stimulation and daily LDs but maybe someone with more knowledge in this topic can give a better answer.
2. If you refer to the ability of being able to LD daily then I think no. A lot of people can only achieve it as a very long term goal. Consider yourself lucky!
3. I've had 3 LDs so far. My last 2 ones, especially the older one was like what you describe as half-lucid. In the first one I had (although the dream lasted only a moment) there was a full feeling of totally KNOWING who am I and that I was INSIDE a dream. These new ones lacked that feeling. I knew that I was dreaming but maybe I wasn't fully aware of what that meant and wasn't aware of my WAKING MIND in the dream. I think you get more FULLY lucid dreams as you progress because your mind gets used to the feeling of the dream world. Or maybe it is only bad luck... . Anyway, they are still awesome!