I don't think Anders really enjoys talking to people. That's not a shot at him. I don't really enjoy it either if I'm being honest. Unfortunately for him, being the frontman of a band generally means more interviews, press stuff, etc. But even talking to him as a fan and watching other people talk to him, you could see he wasn't having a great time. He probably just isn't very social.
Bjorn on the other hand is very outgoing and you can tell he is more of a 'people person' than Anders is. The last time I talked to any members of the band in person, it was Anders, Bjorn, Peter and Daniel. Bjorn and Peter were very friendly while Daniel and Anders were much more reserved. Jesper was nowhere in sight. Funny story, one time in San Francisco, I actually saw Jesper jogging away from fans who were coming up to talk to him. That's how social he is. Or was, at the time.
I believe that was the same show when Johan came out and played bass on Behind Space -- which I had totally forgotten about until now.