I saw him at the Toronto film festival last year at a screening of a movie he did with Kristen wiig. After the movie, the cast came on stage and took audience questions.
I've seen that sort of thing before and I usually get the sense that the cast doesn't really want to be there and they seem eager to wrap it up. Either that, or they just kind of talk amongst each other and ignore the audience. But Darren was so genuine. He was really engaged with the audience, and very humble. He seemed like he was thrilled to be there and didn't act like it was a hassle.
He does seem like a really nice guy, and really down to earth.