I had to choose the off-topic option. My current group constantly goes into off-topic conversations, either related to gaming or not. I'm sorry, but I show up to game, not talk about new rules in this supplement or that, not to talk about the latest movie someone saw, etc.
Combat taking too long comes in at a close second. My god, can no one plan out any strategic actions? I try to "command" the group and give orders as a party leader, but it seems like everyone just wants to ignore them, causing the battles to stretch out over 30 minutes to an hour, just for one combat!!!!