What is the most demoralizing single pin leave?

[Gunz1911]

I really wish I had a way to video tape it, But the worst for me was hitting a good strike. Then having the 10 win wobble all the way over and stop betwen the 7-8 pin and stay straight up. So now me and the 10 pin are arch enemies.

[YODA]

Head Pin for sure, but other than that the "7"Pin for me.. I can spare the 10 pin easy, but cant even count the number of times I have failed to pick up a lonely 7 pin

[aussiedave]

I vote for the 8 pin.

Depends on the frequency of a particular pin too - for instance, I voted for the 8 pin, but how many of those do you leave in a night compared to 10's? How many times does a ringing 10 break a sequence of strikes or prevent you from getting a string going? Now that's frustrating...
Only last night I had 7 or 8 of the blighters and could quite easily have had a strong 600+ series instead of just scraping into the 500's. Very frustrating.
ad.