What will be the most fierce competition on the Falcons 2015 roster?

Opening up a discussion this Friday afternoon, as I am wont to do in the slow, sleepy days of May.

Here's my question. When you look over this roster, where do you see the most fierce position battle taking place? There are many worthy choices with a new head coach and plenty of new additions to the roster, so there's very few bad answers to this question. Aside from starting quarterback. That would be a bad answer.

For my money, you can't beat the competition at left guard. There's no clear, obvious frontrunner for the job, there should be at least four or five players actively competing and the Falcons urgently need to get a halfway decent starter there to solidify the offense line for 2015. At this point my guess is James Stone, but the hallmark of a good competition is that you really don't know who is going to win, and that's certainly the case here.

Sound off, if you would.