The best part is all of the hugs, the I-love-you-Daddy-s, the endless curiosity (tonight's: "if you use Apple Pay, are they taking [cash] dollars out of your phone?") and a newfound recognition that other people with their own dignity and needs exist.
It is still a lot of work, but I love spending time with my kids and seeing them learn and grow into civilized people.
When they're much younger you constantly have to fret over them, but now she's learning to write, asks fun questions and overall the "spark" of being her own person is really visible.
While I used to enjoy babysitting earlier too, back then I still used to be glad to be done so I could rest and catch up on some hobbies while nowadays I usually feel pretty guilty having to leave.
Then that integrated little soul gets thrown into major hormonal shifts…