Never met the man, but what I do when I meet well-known people is to comment on something of their work that isn't obvious or they haven't heard a thousand times before. Sometimes you get the brush off, sometimes they engage you because you mentioned something they never get asked about.
Not to name drop, but a few fer instances...
- James Cameron—told him how much I appreciated a keynote he gave about VFX...he gave me his business card
- Richard Williams (animation director on Roger Rabbit)— told him I didn't want an anything from him but that I was there just thank him for all his work...his wife even asked me my name, so I made some impression or other
- Henry Selick—I didn't discuss Coraline or Nightmare Before Christmas, instead expressed my disappointment over Disney canceling the previous film he'd been working on, and we ended up chatting about what he was thinking about the approach he might take to his next film
- Todd Rundgren—I mentioned how much I liked his 1985 album A Cappella, and he replied "that's obscure!"
I'll be interested to hear what you say and what your experience is.