And on rare occasions the names of the characters.
"Dude, isn't that exactly the same character that was literally just killed last session?"
"No it's not - it's completely different!
This one's an elven archery ranger named Therevinthyus who spells his name with a
Y!"
I once named my character "Bob, the __", copied the character sheet about fifteen times, and just wrote a new number in the space when he got killed and I had to start over... I later memorialized the character in 5th edition by naming a character "Bob, the 27th". He's adventuring to find out what happened to Bobs the 16th-the 26th...