It feels normal to pass 3NT if you could be sure that partner has a stopper in every suit. However, simulations often lead to surprising results, so I did a simulation of 1000 deals with the strong hand having at least an ace, king or queen in every suit. The results were: Clubs 11+tricks: 66% 12+: 21% Total tricks available: 10788 Hearts 10+tricks: 66% 11+: 32% 12+: 6% Total tricks available: 9917 NT 9+tricks: 69% 10+: 38% 11+: 6% Total tricks available: 8872 The percentages and total tricks for the heart and club game did not change much. Not surprisingly there was a significant improvement in the NT-game percentages. Clearly in a MP-game hearts still stand out by a mile. Even in a team game hearts is probably the winner. NT makes game more often in 3% of the cases, but hearts makes a trick more per board (although a 1000-board simulation may not be enough for such a conclusion, because the differences are so small). Psychologically in a teams game it's probably better to pass 3NT. Everybody will understand a pass of 3NT even when it goes down, but when 4H goes down while 3NT makes, I bet your teammeates won't be happy with you :( ;).