[jnbiche]

I personally leave out "I", but yes, I have seen HR professionals suggest that you leave it in for the reasons you just stated (lack of self-confidence).

This is why it's important for hiring companies to have an open mind, for both their sake and the candidate's. Yes, a resume should be well-written, to the point, and free of errors, but realizing that everyone has their own idiosyncrasies will go a long way.