LD'ing- Now, or previous? Touch? Smell?

[penguin]

This title is pretty much self explanatory. Now that I think of it, I don't think I've had a LD before. I'm asking everyone who LD's (pretty much everyone here) if you FEEL & KNOW that you are currently sleeping and this is a LD, or do you wake up and just REMEMBER the LD? Do you have all of the sensations as the ones in real life, meaning you cannot tell the difference between a lucid dream and real life? I need a comparison of real life and a lucid dream... the likes and differences. Please&thank you! I want to keep it all in mind when I realize I have had my first lucid dream!