Selecting profile pictures for a presentation or web site is always tricky. My advise is to take a huge amount of photos to have as many options as possible to select the best one.
The first and most obvious selection layer are obvious mistakes. Closed eyes, the tie not sitting straight, basic face expressions.
The second layer is more tricky. If you look carefully at a portrait image, it is usually possible to guess the sort of mood the subject was in. The face can be smiling, the eyes not. The person can look embarrassed, amused, shy, uncomfortable, curious.. Pick the one that suits best.
Think about this when your picture is being taken. Look at the lens of the camera, the way you would want to look at a potential investor or client standing in front of you. Professional actors can do this for every possible mood they want to project. For you, it is enough to do what comes naturally to you.