So, yesterday...

Jelly. ;_;

Forgive me for not knowing, but who is he?

Is it true that he really has a nearly impenetrable atmosphere of awesomeness that surrounds him wherever he goes?

Yes. Yes it is. He is seriously just such a nice guy, and he was genuinely happy to meet all of the bronies attending the concert.

Forgive me for not knowing, but who is he?

He's an actor, most famous for playing the omnipotent "Q" in Star Trek, as well as Discord from My Little Pony (who was intentionally written to be like Q because Lauren Faust is a Star Trek fan). You might also know him as Shapiro from Torchwood: Miracle Day, or as the voice of Professor Fitz Quadwrangle in the video game "Quantum Conundrum".

The event was a performance of Mozart's opera "The Magic Flute", in which John did the narration. He actually specifically requested that bronies attend, so all of us in the area made a big meetup (around 40 of us!) out of it. Even though I've never been to an opera before, the performance was really great, and getting to meet him after the show was amazing.

~ (^{A V}_T^O_A^H_M^K_E^A_R^H)

My sister bought that shirt for one of my best friends.

That's awesome! He's been in a lot of shows I've watched over the years and is great every time.