Rest, Nourishment and Recovery
Pathfinder 2e does a much better job at handling rest than D&D 5e, but I still like to expand the rest system with different qualities of rest with different benefits. Therefore, there are different qualities of rest a character can obtain based on their quality of shelter which affects their total hit points recovered:
Similarly, the quality of your nourishment will affect your natural healing abilities and energy, which is represented by the amount of hit dice recovered on a long rest: