[that_pope]

If I bet on the river, and get called, I show my hand instantly 100% of the time, automucking is -EV I think. If it is a bluff, my opponent may missread his hand and muck himself, and if I have the winner as I suspected, what am I gaining by knowing his exact two cards, other than I was betting the best hand as I suspected.

If it checks around the river, and I know I have the best hand, I show it. If I think I do, I usually verbally announce my hand outloud, like ace high, or pair of 5s, and if no one turns their hand over in the next 5 seconds (usually enough time for a better hand to show up), I will turn my cards face up, and usually get the pot about 80% of the time.

If I call a bet on the river heads up, I will make the bettor show his hand first, all the time. If I am playing a very multi-way pot (atleast 4 people left on the river) and I am exactly next to act after the bettor, I will likely call with nut hands, hoping to not chase away people who will overcall by raising, and then instantly flip over my hand, since I know it is good.

So basically, I only wait if I make some sort of crying call, or it is heads up and I am the caller.