They're both theatrical performers par excellence, but most importantly they have worked together for so long they have an intuitive understanding on stage. Meat likes to ad lib, and Patti can match him every step. Aspen did brilliantly imo the tour she was with Meat. She had a great voice, a pretty good helping of theatricality herself, and grew into the role magnificently. But you can't beat years of working together closely, to that point where you are completely in tune with the other person. I'm sure there are singers who have as good a voice as Patti, have great stage presence .. but there's a spark between them that has developed over the years, and I think the fact that Meat knows she is his rock when he's on stage means he can relax more in the confidence that Patti will match him move for move, play for play, and taunt for taunt in Paradise
Imo they have always had a perfect synchronicity which raises their strength and sway together on stage to the power of 10 :)
Caryl