Just as I don't believe that Love is a choice, similarly I believe that Faith/Belief is not a choice.
Again, the proof is simple: try to believe something purely by willpower. I challenge you to believe that the Earth is Flat, or that George W. Bush is your biological father (note: this example doesn't apply to Bush's actual biological children). If belief and faith really were choices, then we would be able to beleive such things. But we can't.
That is not to say that we can't believe those things; after all many people did beleive that the Earth is Flat for millennia. It is to say that we can't beleive these things as a choice of the will. We can come to believe things if were are somehow convinced of them, but whether an argument is convincing isn't really a matter of choice either. It either convinces you, or it doesn't, but you don't make a decision about it.
Now it may at times seem like we've chosen to beleive something. If the case is borderline convincing, then we may realize that we think that the case is convincing (or not) and that realization may seem like a decision. Or alternately, someone may present to you a case that really ought to be convincing to you, yet for some reason it is not. You might then reject the case saying "I choose not to believe that", though in fact it simply did not convince you.
Ultimately, I think that we have very little (if any) direct control over what we believe and/or have faith in. Just as I think that we have very little (if any) direct control over what we love.