0
here is my list
1) if you're in Normal Difficulty, don't press Escape or Space to skip the cutscenes or dialog
the people you're playing with may not have played the game through yet and they may be interested in seeing/hearing the story
2) don't click a Shrine until everyone in your party is near
3) don't run into a dungeon and press Accept until you've asked you're party if everyone is ready
somebody may want to swap skills or empty their inventory before continuing
4) if you split up to speed up the search for a quest objective or dungeon or exit, remember to keep an eye on the dots on the mini map
one of the people in your party may have gotten hung up by a mob that you passed by (often happens in the Queen Asylla level with the Warden when you're searching for prisoners to be freed)
they may be in trouble and need a little help
5) if you notice someone has leveled up, then STOP, WAIT
they probably want to adjust their skills
6) after the group kills an Act Boss don't immediately start the next Act
people in the group may be in the middle of selling items and you interrupt and transport them to the next Act
any others you can think of ?
7) If your in a public game and go afk and will be afk longer than 3 minutes just exit the game.
Rarely play public, but i think this might be impt.
REViving when dead in a scripted boss fight, dun shout at pple to go out of the way to do it
If you get some rare drop you know is junk to you, ask if someone needs it before vendoring it for 100 gold.
Bookmarks