I think if you saw him for the first time it was good. I think the person you are a fan off can hardly mess up because of your excitement and you are just in a happy to be there mood.
For me my reaction to the London panel was : meh…
it was not bad but it wasn’t great either. In my personal opinion he seemed off, a little reserved and kind of assuming that people were out to get him with their questions. Which was odd because no one asked questions he could get “in trouble” for. His body language to me was weird, his humor was a little off. To me he seemed stressed. But he still is a professional and knows how to act at those panels. The good thing was the panel was maybe 60% full so everyone had a good seat. The chairs were fucking uncomfortable and because the panel wasn’t in a separate room the noise from the people behind the partition walls was a little annoying.
So if I had to give him a grade it would be a C.