I was South, holding:
The auction had gone:
What is your bid?
When I posted this as a poll on Bridge Winners, the votes were 2:1 in favor of 3NT over 3S. I chose the unpopular option assuming that if I heard back 4D, I could bid 4NT (natural) but over anything stronger, I could investigate slam. My two aces looked extremely powerful.
Unfortunately, with the preempt having removed a lot of bidding space, 3S only served to torture partner. She held:
Without the Ace of diamonds, she did not feel comfortable bidding the NT game, and so it was in 4S that I played. I deserved that, for not bidding what was in front of my nose.