Another common theme could be self - discovery. Jill may be on a journey to discover more about herself, her powers (if she has any in the fanfic), and her place in the Berserk universe. This could involve her learning from her experiences and growing as a character.
I'm not sure which specific 'berserk jill fanfic' are the best. You could try searching on fanfiction platforms like Archive of Our Own. There might be some interesting stories about Berserk and Jill there.
Jill is perhaps a protagonist in bedtime stories. She may represent different things in different stories. In some, she could be a brave hero, while in others, she might be a kind-hearted helper. It depends on the specific plot and theme of each bedtime story.
In my opinion, 'Laughing Jill' can be a good story. It has interesting characters and a unique plot. However, it might not appeal to everyone as everyone's preferences for a good story vary.
Well, Jill in bedtime stories could be a magical fairy, a brave adventurer, or maybe just a friendly neighbor. The possibilities are endless, and it all depends on the context and plot of the story.