My problem with Siri...
I've been trying to make a conscious effort to use Siri more than just setting a timer while we cook. Things like reminders, notes, and the occasional Google or Wolfram Alpha query. However, there's one issue that keeps cropping up that makes it frustrating to use (besides its horrible accuracy):
Seriously! I have some sort of eloquent thought I want to save, or maybe a list of 5 items I want to add to a shopping list. I hit the home button, wait for the double beep, and then suddenly forget how to speak.
"Siri, add carrots and uh... hmm... apples, and err uh cheese to my [crap, what list did I want to add to again?!] --"
"I'm not sure I understand, Dave."
Happens every time!
But when you said stage fright I thought you were referring to the FAR greater problem with voice commands on mobile devices: being around other people. I feel like a complete tool when I dictate something into my phone with friends around, let alone complete strangers. It sucks because dictation is - for me, at least - the fastest way to get a thought down into my phone.
But as far as the stage fright, it might be the beeps. I notice when dealing with radio traffic for work, people tend to speak better when they aren't confronted with the key up noise. So the PTT button on the side makes the noise but the earpiece PTT doesn't.