I like to roll in the open so when A monster needs a 5 to hit the players, like thier characters, realize how dangerous the opponent is. I use it to build exitement during combat. My last combat was teetering back and forthas to who was winning to the very last round and with players saying. "He needs a 20 to hit me becuase of my 35 AC" and I roll a 20 it makes them realize they can't take anything for granted. I also confirmed with a crit on that one. The player seeing the roll was worth more then me just saying he hit.
I let players make rolls for anything that is logical and just adjust the DC for the skill used. When I need to roll secretly for search and Spot/listen I just do it in my cupped hand. But even then I usually let them roll in the open they are failr good about keeping in character even when they roll a 1 knowing something is there to be spotted. Also when they roll 20 and end up with some huge number they make jokes about being able to hear a man's heart at 100 feet. Not realistic but sometimes funny.
Later
I let players make rolls for anything that is logical and just adjust the DC for the skill used. When I need to roll secretly for search and Spot/listen I just do it in my cupped hand. But even then I usually let them roll in the open they are failr good about keeping in character even when they roll a 1 knowing something is there to be spotted. Also when they roll 20 and end up with some huge number they make jokes about being able to hear a man's heart at 100 feet. Not realistic but sometimes funny.
Later