Telling stories over and over that no one wants to hear. Related - They have a story about EVERYone, or they'll make one.
Drinking coffee regardless of what time it is.
Being adorable (not all of them, but there are some -- since this isn't a thread that ALL old people are good at).
Playing ridiculous card games. Like ones that you don't really win or lose, or take 5 hours and it only matters who wins the last game. And, wasting time in general.
Not pm-ing Trim.