I also love freeing the slaves, especially if you're a good lock pick, you just go around freeing everyone and then accessing the dialogue options of the slave owners walking around super pissed because their slaves are all escaping hahaha.
But there's some famous daedric Prince that's still alive in one of the temples, and I accepted that quest way too early, and so I went to the temple but then he attacked me and I had to run away and it's right next to a giant field, so I just kept back running and slicing with my broad sword and avoiding his slices and slicing with my broad sword and running backwards for like a good 40 minutes until I finally killed him and beat that quest.
That's pretty memorable haha