Hey r/gaming! I am going to be doing a skype interview with Gabe Newell very soon and want to know what you would ask him?

So yeah, I'm a games student and thought it would be cool to do an interview with Gabe. We did a video conference with him last year which I helped organise organised but never really had anything to show for it. I want to post something on our website before I leave for university that would get the students on our course the recognition they deserve and feedback from gamers like yourself. We can be a bit biased since we are mates. So reddit, what do you want to ask Gabe?

EDIT: I would just like to mention that I have had confirmation from Valve that I am doing one. Plus I will TRY get at least one HL3 question in there!

EDIT2:For the video conference I would like to mention that my college tutor also put in a lot of work with that.