When SLDD came out, the band was signing copies here in NYC. I was there, and barley had 5sec to go down the signature production line. It was a mad house. I thanked them for all their great music, and told em to keep it coming. (Oddly enough, they didn't... up until recently.)
But if it were a real scenario, and I wasn't rushed, or overwhelmed by being face to face with the band... I'd:
-Plead for them to keep making music since there is such a shortage of greatness these days.
-Ask them to release all the shit they have locked away... (B-Sides, DVD's, Live shows, etc...)
-Plead for them to go back to their older ways.... (More experimental songs, acoustic songs/sets, diversified playlists, covers, Scott coming out in crazy outfits, etc...)