I never show my hands because of one simple reason, i use other
players interaction ingame to make notes of their playstyle.
Showing bluff hands when they fold
Showing value hands when they fold
Showing good hands in bb when all fold
Talking trash in chat
General talk in chat
All is a little part of a story bout their emotions and how they play, of course
combined with other things.
Thats why i never show my hands
I don't show my hand.
If others do, it is rarely usefull for them.
The effects I can think of:
+ tilt your opponent
+ create a wrong image of yourself
- you give information
- get focus on yourself
The first two are difficult, while the last two are nearly always very usefull for your opponents.