When you have your first lucid dream it's truly amazing and awesome and I will remember my first till the day I die.
I was in my school hallway when and realized I was dreaming, I was so excited, I looked at my hands, and saw to kids in front of me, I blew them up with fireballs and sprinted out the door and jumped and started flying, but I fell and woke up.
If you can't remember your first LD, then just think of one that was very memorable or vivid.