Partner stayed up late playing a game, came to bed at like 4am. Which caused the cat to wake up and start screaming in my ear, so I've been up since like 4.30am.
I don't mind when he stays up late, or I get woken up by the cat. I'm more annoyed that once I'm awake, I can't sleep again until I'm exhausted (which is usually mid arvo when I'm up this early).
There is something kinda peaceful though, being awake at this hour and hearing the rest of the world wake up. The street cleaners and garbos are paid well, I hope.