Bucket List
I worked in hospice. The top regret from patients was not spending time with family and/or lost time due to a family feud. Probably number two was wasting their life with their spouse (for various reasons) when they could have possibly been with someone they loved or met a soul mate. Number three was usually not accomplishing a bucket list item such as living in a foreign country.
We were not supposed to let people bring their pets in to say goodbye, since other people could have allergies or an untrained pet could poop somewhere. Still, I always told family members to smuggle in Fluffy in an oversized purse, Paris Hilton style. Large dogs were harder, but since they were literally emotional support animals at the time, I never told them to leave.
Story credit: Reddit / pink_post_it_note