[dannywoodz]

Titles can be important for dealing with clients. Many organisations won't even give you time on the phone unless they see that you're a 'Managing Director' or 'VP of Sales'. If you impress your client with your product, you'll inevitably get a chance to present to their superiors, and it helps a bit if your contact doesn't have to introduce you as 'the guy that does this stuff'.

Of course, as has already been said, it's important to remember that these are just titles: they don't change your work or what you're trying to do.