Yes! My faith and/or values absolutely does affect the way I conduct business or deal with customers. To think that keeping these things separate, in a very realistic way, would be business self-sabotage. And he's why...
For example: I do my best to be as trustworthy as possible for my customers. If they see that you are watching out for them, at the a slight downfall to yourself, then that customer is more willing to continue to be a customer because they realize that you value them more than their money, and therefore they will always come back to your services for their needs.
And as far as not sharing anything personal about yourself within a business situation or relationship, that too, could be self-sabotage. And here's an example:
Now, to free disclose personal information about intimate details of one's marriage through a business relationship, of course you should NOT do this. But proclaiming one's faith or values is very different. Not to say that you should always pound the Bible to customers and co-worker or anything like that, but there can still be room to share these things about yourself to others within a business relationship. Although, you should not ACTIVELY or REGULARLY try to do this during business hours or on business property, this can still be done. If you are a Christian, as I am, you know that witnessing is something that you should be doing on your own time, and preferrably not on business property, out of respect for you Boss/Business relationships. But by trying to HIDE the fact of what you believe or how you think it is right to conduct yourself daily through business or any other avenue in your life, you MUST make it known and not fear the results!
Personally, and not because I am a Christian, I would prefer to know what a person's faith/ values are within a business relationship. If I were to deal with someone through a business relationship about something that requires a trust factor, at least if someone IS honestly a Christian, actively living a life in that manner, I know that person is more trustworthy that maybe another might be, becasue of the fact of the values the Bible teaches; honesty, trustworthiness, steadfastness, endurance, love, kindness, being considerate of others, repaying evil for good, etc, etc.

