Samuel didn't say, "You want your memories back?" He said, "You want to know who you are?"

That's an excellent point. And there may have been some manipulation there, too, like for instance Samuel telling Damian to only show ~Sylar the most gruesome memories?

The family idea would also tempt Gabriel as well as Nathan.

*nods* Definitely. And there was a time where Gabriel longed for absolution (forgive me father for I have sinned), so that would also apply to him as well.

That's interesting about Slow Burn and the carnies' dynamics. Maybe I should watch it at some point.