My job is pretty flexible about time. I don't have an exact time to be there first thing, and I can leave early if I want, as long as I make up the time later in the pay period. That's an enormous benefit.
Some days I'm filled with fire, and leave my house at what my brother calls "oh-dark-early" in the morning, so I can dig right in.
Other days I leave early because my brain says, "that's it, Mako, we're done here." Friday was like that. I just got sort of brain-full, and needed to come home.
I'm really grateful I get to do stuff like that.