What questions about you Phd (and PHD life) do you wish you had asked at your interview? I have one coming up!

So many that I can't list them all here. My mind just went blank, I was given the option to email them afterwards with any other questions I had though. I would ask to see the labs, and possibly talk with a current student, I got alot more from talking to the student than the supervisors - it also gives you an idea of whether you would fit in there and what the social life etc is like.