Wonders of the business world - Titles

I come from an academic home so i realize the importance of titles. Logically titles should describe what function the holder takes care of, but it appears they are really meant to impress.

So how does this work in todays business world. Well a bit about me first. I'm 23 and studies computer science at the University of Copenhagen. So if you were to hire me part time what title should I have?

Personally i would prefer something like "part time student helper" or "assisting web designer" or something not too godlike and overpowered. However my employer seems to think this is a bit too modest - though I find it rather accurate - so here are some examples of what I have been called at business meetings, presentations and so on.

Data specialist
IT consultant
SQL expert

I like these titles, but I could do without them and there seems to be a tendency towards customers actually believing those titles. The result is that they think I have actual decision power, and so expect that I can take action on subjects like business strategies and pricing. This leads to some confusion then the "expert lead specialist consultant" has to call the "layout guy" to decide which technology infrastructure we should go with.

Lesson, drop the silly titles.