I think one of the most difficult things to do when you’re in a debate must be to keep your reactions in check while you’re not talking. Vice President Joe Biden was very animated Thursday night. I wonder if sometimes he isn't mindful that he is always on camera during a debate, or maybe it's just part of his technique.

NBC's David Gregory and Tom Brokaw discussed Biden's reactions in their post-debate commentary. See the video below.

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NBC News’ Michael O’Brien also reported on Biden’s debate reactions

The vice president threw up his arms, laughed, scoffed and rolled his eyes in reaction to Ryan’s attacks – a seemingly visceral reaction to what Biden frequently called “malarkey” offered up by the House Budget Committee chairman.

Biden’s response to Ryan’s proposals to reform Medicare into a “premium support” or voucher system was a typical refrain for the vice president: “Folks, use your common sense: who do you trust on this?”

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Slideshow: On the campaign trail

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The first of three presidential debates occurs Wednesday and many voters will use these events to educate themselves on the candidates. We want to take this the opportunity to hear what it would take to change your mind from an undecided voter to a Romney or Obama supporter.

How do you participate?

1. Take a picture of yourself, or a photo representing the issue that is most important to you.
2. In the caption (or a tweet), tell us what you want to hear from the candidates. Keep your responses short.
3. Tag your photo #NBCNewsPics in Instagram or Twitter.
4. Or upload your photo in the box below.

On Wednesday we’ll publish a selection of your photos and responses in PhotoBlog, so stay tuned. 

Related Links:

• Inside the Boiler Room: Debate expectation
• Debate will be Romney's chance to alter trajectory of the race
• Christie predicts Romney debate performance will change course of presidential race
• First Thoughts: After nine battleground polls
• Complete election coverage on NBCPolitics.com