I've never been FULLY Lucid in a dream, but i've been pretty close.
Just last night I had 3 (I think it was really 1 dream but the scene changed a few times) and I was looking around and everything and it was so real and I knew when I woke up I wouldn't be able to remember how everything looked, and I thought about what I was going to write down (This usually causes a false awakening where it right it down, and it did this time too) And I kept thinking "What was I going to do when I became Lucid again?" But couldn't really remember. oh well