"You look Time Lord."

I'd agree with you on the subject of Rory spending 2,000 years as living plastic guarding the Pandorica to protect Amy...except for one thing.

Rory chooses to do so.

And, in fact, chooses in direct opposition to the Doctor's advice. It's dangerous; he's made of plastic now so he can't heal if he's damaged; he can't sleep; he'll be completely alone for thousands of years; he'll almost certainly go mad; and honestly, the universe is in danger, and Rory's girlfriend isn't nearly as important as the universe--

And Rory socks the Doctor. HARD. And says four words that make him the best fictional boyfriend ever:

"She is to me."

So Rory chooses the trap, the prison, the possible madness. And he chooses it out of love.

The odd meeting ground between Rory and Moffat's women is, oddly, Craig, the frustrated fellow in The Lodger, has an unsatisfying life in a boring town. He would love to leave--but he chooses not to, because by staying, he remains in the same town with the girl he loves but who he believes doesn't love him. He chooses the trap--but he also chooses not to speak of his feelings or to ask her about her own. He has agency...but he doesn't allow the woman he loves any, for fear that he'll lose her.

Which is the motive for Cal's father, the Tenth Doctor, Liz Ten's male employees, and Kazman. "I'll miss this and I'll miss that and DON'T LEAVE ME! And for God's sake, DON'T CHANGE."