I've only had two lucid dreams. They were both kind of a waste considering all that I did, but very cool nonetheless.
One was very weird, like all dreams are. The door to my bedroom had a small hole in it, and I had a toothpick! When I stuck the toothpick into the hole, and opened up the door, my bedroom randomly changed into a different configuration with new furniture, tech, toys, etc. Was really cool. But for some reason, whenever my dad came into my room, my room was normal and it was like nothing even happened! >:c
My second was very funny, because it started out as a nightmare, then turned into a very long adventure (seemed like 4-5 hours.) I woke up, but very quickly went back in, like Sheath said. The funny part about the lucid dream was it was completely wasted, as I didn't do anything. The only thing I did was try to tell my dream friends that we're in a dream (DERP) and turn my arms into motorcycle handlebars. :\
Also, I've flown in a non-lucid dream before. Very cool, weird feeling.
AAAAND Inception is an awesome movie. I seem to be the only one in my family to like it. The rest of my family was like, "Meh."