Well, I lucid dream semi-often so I can pull up a few examples, which I'll try to shorten so it's not paragraphs upon paragraphs.
-I was in the middle of an art lesson when I realized I was dreaming, just suddenly went "I'm fucken dreaming." I blew the roof off of the building and flew around some mountains for a while, generally fucking with the freedom of lucid dreams, helped out a tourist even though I knew it was just a dream, so take from that what you will, but the flying around was nice.
-Second most fun time in lucidity was when I was just dreaming I was in a class that I can't remember. I noticed that the clock wasn't actually ticking, and that no one was saying a word, which tipped me off. I just became Deadpool for a while (I had recently watched the film) imaged myself in a suit, but also looked at myself from a 3rd person view, so I broke the fourth wall in my dream by looking at the 'camera' (which I could see though) which was so much fun to do lucidly, and it's made me remember it vivdly
Most of the other ones I'm just kinda not fucked enough and wander around my dreamscape for a while, occasionally acting like a god and blowing buildings apart, making cars explode. But there was one time when I realized I was dreaming, but just went along with the dream anyway. I didn't do anything super cool and weird, I just went along with the script of the dream, which was just talking to a bunch of my friends, it was weird as hell, made me feel like I had forgotten my lines in a play, but still fun