I liked the spontaneous branch-off of what seems to have been a list of ‘pre-written’ questions for this circuit of interviews (anyone else feel like they were scripted?) but personally, I can’t stand Lopez. Decent as an actor, but I don’t know, I don’t like his show.
But I feel he was about as equally relaxed with Leno, but I don’t think his relaxation relies on who is interviewing him. I’m pretty sure he just doesn’t like being the center of attention to large crowds who he doesn’t know and talking about himself. He’s just not one for gloating and likes to keep private matters private.