The interviewer was really nice and you will be fine so long as you prepare! Most of the questions were based around those found on this link:
Make sure you:
Know what PwC do (i.e. their different service lines) and how they add value to their clients
What do you know about PwC (history, clients, reputation, consulting is the focus for growth over next 4 years, part of big 4, commitment to sustainability etc)
Why you would like to join PwC (culture, training, times top100, reputation etc)
Why are you interested in management consulting? Where did this interest come from?
Have researched a business issue that is in the news at the moment or has been recently- what are the implications of this issue? I talked about the Royal Mail strikes. They might ask u how Consulting could help this company. This part is crucial
Have an example (or 2) about a time u have worked in a team. what was ur contribution? (will def be asked)
Know these questions inside out and you will be well on your way. Don’t write them out and then read them in the interview- they will be able to tell that u are doing so!
You are right, they make you feel very comfortable, and I found it was actually a very pleasant interview (and it was my first one)- but I prepared well.
Thanks for the wishes, best of luck to you too