> 5) stand up in the middle of a conversation and walk out the door because it's 2:30 PM and their day is over;

My dad would do the same stuff. He worked at Samsung. When he got into his 50s, it was like a switch turned on and he just wouldn't stay beyond a standard work day. Got a meeting you scheduled late in the day? Too bad, he was there at 6am and was going home. He was always home at the same time.

In comparison, during this period of time my mom would go into the office at 8am and stay as late as 1am. She would even pick up 2nd dinner for me on her way home.